From 3ef5e041117b807bdae8ce49e39f708287f0e738 Mon Sep 17 00:00:00 2001
From: mmy0302 <mengyu_miao@connect.hku.hk>
Date: Thu, 23 Jul 2026 23:54:09 +0800
Subject: [PATCH 1/3] feat(i18n): add simplified and traditional Chinese
 language support

Introduce limited i18n with English, zh-CN and zh-TW via i18next + react-i18next. Language persists in SQLite settings and can be switched in the Settings screen. Core screens (tabs, today, pantry, rescue, insights, settings, onboarding) now use translation keys. Jest setup with global react-i18next mock using English translations.
---
 mobile/app/(tabs)/_layout.tsx                 |  22 +-
 mobile/app/_layout.tsx                        |  78 ++++--
 mobile/jest.config.js                         |   1 +
 mobile/jest.setup.ts                          |  30 +++
 mobile/package-lock.json                      | 138 +++++++---
 mobile/package.json                           |   3 +
 .../src/features/insights/InsightsScreen.tsx  |  34 +--
 .../features/onboarding/OnboardingScreen.tsx  |  20 +-
 mobile/src/features/pantry/PantryScreen.tsx   |  65 ++---
 mobile/src/features/rescue/RescueScreen.tsx   |  30 ++-
 .../src/features/settings/SettingsScreen.tsx  |  80 ++++--
 .../settings/__tests__/screen.test.tsx        |  16 ++
 mobile/src/features/today/TodayItemCard.tsx   |  77 ++++--
 mobile/src/features/today/TodayScreen.tsx     |  40 +--
 mobile/src/i18n/index.ts                      |  81 ++++++
 mobile/src/i18n/locales/en.json               | 242 ++++++++++++++++++
 mobile/src/i18n/locales/zh-CN.json            | 242 ++++++++++++++++++
 mobile/src/i18n/locales/zh-TW.json            | 242 ++++++++++++++++++
 18 files changed, 1226 insertions(+), 215 deletions(-)
 create mode 100644 mobile/jest.setup.ts
 create mode 100644 mobile/src/i18n/index.ts
 create mode 100644 mobile/src/i18n/locales/en.json
 create mode 100644 mobile/src/i18n/locales/zh-CN.json
 create mode 100644 mobile/src/i18n/locales/zh-TW.json

diff --git a/mobile/app/(tabs)/_layout.tsx b/mobile/app/(tabs)/_layout.tsx
index 74e8711..dd0adac 100644
--- a/mobile/app/(tabs)/_layout.tsx
+++ b/mobile/app/(tabs)/_layout.tsx
@@ -1,5 +1,6 @@
 import { NativeTabs } from 'expo-router/unstable-native-tabs';
 import { useWindowDimensions } from 'react-native';
+import { useTranslation } from 'react-i18next';
 
 import { alpha, colors } from '@/theme';
 
@@ -7,6 +8,7 @@ export const tabLabelFontSize = (fontScale: number) => 12 / Math.max(fontScale,
 
 export default function TabsLayout() {
   const { fontScale } = useWindowDimensions();
+  const { t } = useTranslation();
   const fontSize = tabLabelFontSize(fontScale);
   const labelStyle = {
     default: {
@@ -33,25 +35,25 @@ export default function TabsLayout() {
       labelStyle={labelStyle}
       labelVisibilityMode="labeled"
       tintColor={colors.action}>
-      <NativeTabs.Trigger accessibilityLabel="Today" name="today" testID="tab-today">
+      <NativeTabs.Trigger accessibilityLabel={t('tabs.today')} name="today" testID="tab-today">
         <NativeTabs.Trigger.Icon md="calendar_today" sf="calendar" />
-        <NativeTabs.Trigger.Label>Today</NativeTabs.Trigger.Label>
+        <NativeTabs.Trigger.Label>{t('tabs.today')}</NativeTabs.Trigger.Label>
       </NativeTabs.Trigger>
-      <NativeTabs.Trigger accessibilityLabel="Pantry" name="pantry" testID="tab-pantry">
+      <NativeTabs.Trigger accessibilityLabel={t('tabs.pantry')} name="pantry" testID="tab-pantry">
         <NativeTabs.Trigger.Icon md="inventory_2" sf="cabinet" />
-        <NativeTabs.Trigger.Label>Pantry</NativeTabs.Trigger.Label>
+        <NativeTabs.Trigger.Label>{t('tabs.pantry')}</NativeTabs.Trigger.Label>
       </NativeTabs.Trigger>
-      <NativeTabs.Trigger accessibilityLabel="Rescue" name="rescue" testID="tab-rescue">
+      <NativeTabs.Trigger accessibilityLabel={t('tabs.rescue')} name="rescue" testID="tab-rescue">
         <NativeTabs.Trigger.Icon md="restaurant" sf="fork.knife" />
-        <NativeTabs.Trigger.Label>Rescue</NativeTabs.Trigger.Label>
+        <NativeTabs.Trigger.Label>{t('tabs.rescue')}</NativeTabs.Trigger.Label>
       </NativeTabs.Trigger>
-      <NativeTabs.Trigger accessibilityLabel="Insights" name="insights" testID="tab-insights">
+      <NativeTabs.Trigger accessibilityLabel={t('tabs.insights')} name="insights" testID="tab-insights">
         <NativeTabs.Trigger.Icon md="insights" sf={{ default: 'chart.bar', selected: 'chart.bar.fill' }} />
-        <NativeTabs.Trigger.Label>Insights</NativeTabs.Trigger.Label>
+        <NativeTabs.Trigger.Label>{t('tabs.insights')}</NativeTabs.Trigger.Label>
       </NativeTabs.Trigger>
-      <NativeTabs.Trigger accessibilityLabel="Settings" name="settings" testID="tab-settings">
+      <NativeTabs.Trigger accessibilityLabel={t('tabs.settings')} name="settings" testID="tab-settings">
         <NativeTabs.Trigger.Icon md="settings" sf={{ default: 'gearshape', selected: 'gearshape.fill' }} />
-        <NativeTabs.Trigger.Label>Settings</NativeTabs.Trigger.Label>
+        <NativeTabs.Trigger.Label>{t('tabs.settings')}</NativeTabs.Trigger.Label>
       </NativeTabs.Trigger>
     </NativeTabs>
   );
diff --git a/mobile/app/_layout.tsx b/mobile/app/_layout.tsx
index 84033b1..6088bd2 100644
--- a/mobile/app/_layout.tsx
+++ b/mobile/app/_layout.tsx
@@ -1,12 +1,16 @@
 import { useNetworkState } from 'expo-network';
 import { Redirect, Stack, ThemeProvider, usePathname } from 'expo-router';
 import { StatusBar } from 'expo-status-bar';
-import { useEffect } from 'react';
+import { useEffect, useState } from 'react';
+import { I18nextProvider } from 'react-i18next';
 import { GestureHandlerRootView } from 'react-native-gesture-handler';
 
 import { initializeNotifications } from '@/services/notifications';
 import { AppErrorBoundary } from '@/application/AppErrorBoundary';
 import { OfflineStatusBanner } from '@/application/OfflineStatusBanner';
+import { getFreshLoopDatabase } from '@/data/database/expo-sqlite';
+import { SettingsRepository } from '@/data/repositories/settings';
+import i18next, { initI18n } from '@/i18n';
 import { alpha, colors, useFreshLoopFonts } from '@/theme';
 
 export { AppErrorBoundary as ErrorBoundary };
@@ -33,41 +37,61 @@ export default function RootLayout() {
   useFreshLoopFonts();
   const pathname = usePathname();
   const networkState = useNetworkState();
+  const [i18nReady, setI18nReady] = useState(false);
 
   useEffect(() => {
     void initializeNotifications().catch(() => undefined);
   }, []);
 
+  useEffect(() => {
+    let cancelled = false;
+    void (async () => {
+      try {
+        const db = await getFreshLoopDatabase();
+        const store = new SettingsRepository(db);
+        await initI18n(store);
+      } catch {
+        await initI18n();
+      }
+      if (!cancelled) setI18nReady(true);
+    })();
+    return () => { cancelled = true; };
+  }, []);
+
   if (pathname === '/explore') {
     return <Redirect href="/today" />;
   }
 
   return (
-    <GestureHandlerRootView style={{ flex: 1 }}>
-      <ThemeProvider value={freshLoopNavigationTheme}>
-        <StatusBar style="dark" />
-        <OfflineStatusBanner
-          isConnected={networkState.isConnected}
-          isInternetReachable={networkState.isInternetReachable}
-        />
-        <Stack
-          screenOptions={{
-            contentStyle: { backgroundColor: colors.canvas },
-            headerBackButtonDisplayMode: 'minimal',
-            headerStyle: { backgroundColor: colors.canvas },
-            headerTintColor: colors.text,
-            headerTitleStyle: { fontFamily: 'Manrope-Bold', fontWeight: '700' },
-          }}>
-          <Stack.Screen name="index" options={{ headerShown: false }} />
-          <Stack.Screen name="(tabs)" options={{ headerShown: false }} />
-          <Stack.Screen name="item/add" options={{ title: 'Add item' }} />
-          <Stack.Screen name="item/scan" options={{ title: 'Add item' }} />
-          <Stack.Screen name="item/[id]" options={{ title: 'Item detail' }} />
-          <Stack.Screen name="item/[id]/edit" options={{ title: 'Edit item' }} />
-          <Stack.Screen name="item/gallery" options={{ title: 'Component gallery' }} />
-          <Stack.Screen name="recipe/[id]" options={{ title: 'Recipe detail' }} />
-        </Stack>
-      </ThemeProvider>
-    </GestureHandlerRootView>
+    <I18nextProvider i18n={i18next}>
+      <GestureHandlerRootView style={{ flex: 1 }}>
+        <ThemeProvider value={freshLoopNavigationTheme}>
+          <StatusBar style="dark" />
+          {i18nReady ? (
+            <OfflineStatusBanner
+              isConnected={networkState.isConnected}
+              isInternetReachable={networkState.isInternetReachable}
+            />
+          ) : null}
+          <Stack
+            screenOptions={{
+              contentStyle: { backgroundColor: colors.canvas },
+              headerBackButtonDisplayMode: 'minimal',
+              headerStyle: { backgroundColor: colors.canvas },
+              headerTintColor: colors.text,
+              headerTitleStyle: { fontFamily: 'Manrope-Bold', fontWeight: '700' },
+            }}>
+            <Stack.Screen name="index" options={{ headerShown: false }} />
+            <Stack.Screen name="(tabs)" options={{ headerShown: false }} />
+            <Stack.Screen name="item/add" options={{ title: 'Add item' }} />
+            <Stack.Screen name="item/scan" options={{ title: 'Add item' }} />
+            <Stack.Screen name="item/[id]" options={{ title: 'Item detail' }} />
+            <Stack.Screen name="item/[id]/edit" options={{ title: 'Edit item' }} />
+            <Stack.Screen name="item/gallery" options={{ title: 'Component gallery' }} />
+            <Stack.Screen name="recipe/[id]" options={{ title: 'Recipe detail' }} />
+          </Stack>
+        </ThemeProvider>
+      </GestureHandlerRootView>
+    </I18nextProvider>
   );
 }
diff --git a/mobile/jest.config.js b/mobile/jest.config.js
index 5d10984..2c88875 100644
--- a/mobile/jest.config.js
+++ b/mobile/jest.config.js
@@ -1,4 +1,5 @@
 module.exports = {
   preset: 'jest-expo',
   testPathIgnorePatterns: ['/node_modules/', '/android/', '/ios/'],
+  setupFiles: ['./jest.setup.ts'],
 };
diff --git a/mobile/jest.setup.ts b/mobile/jest.setup.ts
new file mode 100644
index 0000000..d895b96
--- /dev/null
+++ b/mobile/jest.setup.ts
@@ -0,0 +1,30 @@
+import i18next from 'i18next';
+import { initReactI18next } from 'react-i18next';
+
+import en from './src/i18n/locales/en.json';
+
+void i18next.use(initReactI18next).init({
+  compatibilityJSON: 'v4',
+  resources: { en: { translation: en } },
+  lng: 'en',
+  fallbackLng: 'en',
+  interpolation: { escapeValue: false },
+  returnNull: false,
+  returnEmptyString: false,
+});
+
+// Global mock for react-i18next to avoid wrapping every test in I18nextProvider.
+// useTranslation() will use the pre-initialised i18next instance above.
+// Jest requires `mock` prefix for out-of-scope references in jest.mock factories.
+const mockI18next = i18next;
+jest.mock('react-i18next', () => {
+  // eslint-disable-next-line @typescript-eslint/no-require-imports
+  const actual = jest.requireActual('react-i18next');
+  return {
+    ...actual,
+    useTranslation: () => ({
+      t: (key: string, opts?: Record<string, unknown>) => mockI18next.t(key, opts ?? {}),
+      i18n: { language: 'en', changeLanguage: jest.fn() },
+    }),
+  };
+});
diff --git a/mobile/package-lock.json b/mobile/package-lock.json
index 0afaabe..a359df5 100644
--- a/mobile/package-lock.json
+++ b/mobile/package-lock.json
@@ -20,6 +20,7 @@
         "expo-glass-effect": "~57.0.1",
         "expo-image": "~57.0.1",
         "expo-linking": "~57.0.3",
+        "expo-localization": "^57.0.1",
         "expo-network": "~57.0.1",
         "expo-notifications": "~57.0.5",
         "expo-router": "~57.0.6",
@@ -29,9 +30,11 @@
         "expo-symbols": "~57.0.1",
         "expo-system-ui": "~57.0.1",
         "expo-web-browser": "~57.0.1",
+        "i18next": "^26.3.6",
         "ky": "^2.0.2",
         "react": "19.2.3",
         "react-dom": "19.2.3",
+        "react-i18next": "^17.0.11",
         "react-native": "0.86.0",
         "react-native-gesture-handler": "~2.32.0",
         "react-native-reanimated": "4.5.0",
@@ -4254,9 +4257,6 @@
         "arm64"
       ],
       "dev": true,
-      "libc": [
-        "glibc"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -4271,9 +4271,6 @@
         "arm64"
       ],
       "dev": true,
-      "libc": [
-        "musl"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -4288,9 +4285,6 @@
         "loong64"
       ],
       "dev": true,
-      "libc": [
-        "glibc"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -4305,9 +4299,6 @@
         "loong64"
       ],
       "dev": true,
-      "libc": [
-        "musl"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -4322,9 +4313,6 @@
         "ppc64"
       ],
       "dev": true,
-      "libc": [
-        "glibc"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -4339,9 +4327,6 @@
         "riscv64"
       ],
       "dev": true,
-      "libc": [
-        "glibc"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -4356,9 +4341,6 @@
         "riscv64"
       ],
       "dev": true,
-      "libc": [
-        "musl"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -4373,9 +4355,6 @@
         "s390x"
       ],
       "dev": true,
-      "libc": [
-        "glibc"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -4390,9 +4369,6 @@
         "x64"
       ],
       "dev": true,
-      "libc": [
-        "glibc"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -4407,9 +4383,6 @@
         "x64"
       ],
       "dev": true,
-      "libc": [
-        "musl"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -7482,6 +7455,19 @@
         "react-native": "*"
       }
     },
+    "node_modules/expo-localization": {
+      "version": "57.0.1",
+      "resolved": "https://mirrors.cloud.tencent.com/npm/expo-localization/-/expo-localization-57.0.1.tgz",
+      "integrity": "sha512-8Ffl4UTbOsQeGT0v5fxMbyPHyPMPnhSPDFQJa8p9rjJrthFoAtNi+fL6Ssmrvf1/7dmPq1mVY52MEt0TMEfgjA==",
+      "license": "MIT",
+      "dependencies": {
+        "rtl-detect": "^1.0.2"
+      },
+      "peerDependencies": {
+        "expo": "*",
+        "react": "*"
+      }
+    },
     "node_modules/expo-modules-autolinking": {
       "version": "57.0.7",
       "resolved": "https://registry.npmjs.org/expo-modules-autolinking/-/expo-modules-autolinking-57.0.7.tgz",
@@ -8255,6 +8241,7 @@
       "version": "2.3.3",
       "resolved": "https://registry.npmjs.org/fsevents/-/fsevents-2.3.3.tgz",
       "integrity": "sha512-5xoDfX+fL7faATnagmWPpbFtwh/R77WmMMqqHGS65C3vvB0YHrgF+B1YmZ3441tMj5n63k0212XNoJwzlhffQw==",
+      "dev": true,
       "hasInstallScript": true,
       "license": "MIT",
       "optional": true,
@@ -8694,6 +8681,15 @@
       "license": "MIT",
       "peer": true
     },
+    "node_modules/html-parse-stringify": {
+      "version": "4.0.1",
+      "resolved": "https://mirrors.cloud.tencent.com/npm/html-parse-stringify/-/html-parse-stringify-4.0.1.tgz",
+      "integrity": "sha512-0zHsZJrK7S3K2aucXWL6ycoYJ/iNtIcFHC/nYQgFklPtrv5LpJctIiSCroWZWeuoXvuyFdzp6KzjJQ+OT5MfFw==",
+      "license": "MIT",
+      "funding": {
+        "url": "https://locize.com"
+      }
+    },
     "node_modules/http-errors": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/http-errors/-/http-errors-2.0.1.tgz",
@@ -8781,6 +8777,34 @@
       "integrity": "sha512-WDC/ui2VVRrz3jOVi+XtjqkDjiVjTtFaAGiW37k6b+ohyQ5wYDOGkvCZa8+H0nx3gyvv0+BST9xuOgIyGQ00gw==",
       "license": "BSD-3-Clause"
     },
+    "node_modules/i18next": {
+      "version": "26.3.6",
+      "resolved": "https://mirrors.cloud.tencent.com/npm/i18next/-/i18next-26.3.6.tgz",
+      "integrity": "sha512-Bu5Z2nAXgfVyM8xvW3jk9EKRIuX37PudsrBViThNFx7CR7aaYTpP01cxNB/E4c4UUzTDiAZRstEhsRfPOL/8xA==",
+      "funding": [
+        {
+          "type": "individual",
+          "url": "https://www.locize.com/i18next"
+        },
+        {
+          "type": "individual",
+          "url": "https://www.i18next.com/how-to/faq#i18next-is-awesome.-how-can-i-support-the-project"
+        },
+        {
+          "type": "individual",
+          "url": "https://www.locize.com"
+        }
+      ],
+      "license": "MIT",
+      "peerDependencies": {
+        "typescript": "^5 || ^6 || ^7"
+      },
+      "peerDependenciesMeta": {
+        "typescript": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/iconv-lite": {
       "version": "0.6.3",
       "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.6.3.tgz",
@@ -11064,9 +11088,6 @@
       "cpu": [
         "arm64"
       ],
-      "libc": [
-        "glibc"
-      ],
       "license": "MPL-2.0",
       "optional": true,
       "os": [
@@ -11087,9 +11108,6 @@
       "cpu": [
         "arm64"
       ],
-      "libc": [
-        "musl"
-      ],
       "license": "MPL-2.0",
       "optional": true,
       "os": [
@@ -11110,9 +11128,6 @@
       "cpu": [
         "x64"
       ],
-      "libc": [
-        "glibc"
-      ],
       "license": "MPL-2.0",
       "optional": true,
       "os": [
@@ -11133,9 +11148,6 @@
       "cpu": [
         "x64"
       ],
-      "libc": [
-        "musl"
-      ],
       "license": "MPL-2.0",
       "optional": true,
       "os": [
@@ -12903,6 +12915,33 @@
         "react": ">=17.0.0"
       }
     },
+    "node_modules/react-i18next": {
+      "version": "17.0.11",
+      "resolved": "https://mirrors.cloud.tencent.com/npm/react-i18next/-/react-i18next-17.0.11.tgz",
+      "integrity": "sha512-cDtkXgxjuFTWUH6V+aQn1Ve5vDiUztCNPWW5GtSHDccsgRXO1nE6QFWCEmc1KAutrb3OUv87wFShJL5RhUwPXg==",
+      "license": "MIT",
+      "dependencies": {
+        "@babel/runtime": "^7.29.2",
+        "html-parse-stringify": "^4.0.1",
+        "use-sync-external-store": "^1.6.0"
+      },
+      "peerDependencies": {
+        "i18next": ">= 26.2.0",
+        "react": ">= 16.8.0",
+        "typescript": "^5 || ^6 || ^7"
+      },
+      "peerDependenciesMeta": {
+        "react-dom": {
+          "optional": true
+        },
+        "react-native": {
+          "optional": true
+        },
+        "typescript": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/react-is": {
       "version": "19.2.7",
       "resolved": "https://registry.npmjs.org/react-is/-/react-is-19.2.7.tgz",
@@ -13460,6 +13499,12 @@
         "node": ">=4"
       }
     },
+    "node_modules/rtl-detect": {
+      "version": "1.1.2",
+      "resolved": "https://mirrors.cloud.tencent.com/npm/rtl-detect/-/rtl-detect-1.1.2.tgz",
+      "integrity": "sha512-PGMBq03+TTG/p/cRB7HCLKJ1MgDIi07+QU1faSjiYRfmY5UsAttV9Hs08jDAHVwcOwmVLcSJkpwyfXszVjWfIQ==",
+      "license": "BSD-3-Clause"
+    },
     "node_modules/safe-array-concat": {
       "version": "1.1.4",
       "resolved": "https://registry.npmjs.org/safe-array-concat/-/safe-array-concat-1.1.4.tgz",
@@ -14983,6 +15028,15 @@
         }
       }
     },
+    "node_modules/use-sync-external-store": {
+      "version": "1.6.0",
+      "resolved": "https://mirrors.cloud.tencent.com/npm/use-sync-external-store/-/use-sync-external-store-1.6.0.tgz",
+      "integrity": "sha512-Pp6GSwGP/NrPIrxVFAIkOQeyw8lFenOHijQWkUTrDvrF4ALqylP2C/KCkeS9dpUM3KvYRQhna5vt7IL95+ZQ9w==",
+      "license": "MIT",
+      "peerDependencies": {
+        "react": "^16.8.0 || ^17.0.0 || ^18.0.0 || ^19.0.0"
+      }
+    },
     "node_modules/utils-merge": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
diff --git a/mobile/package.json b/mobile/package.json
index 5b32c9e..a31faa9 100644
--- a/mobile/package.json
+++ b/mobile/package.json
@@ -19,6 +19,7 @@
     "expo-glass-effect": "~57.0.1",
     "expo-image": "~57.0.1",
     "expo-linking": "~57.0.3",
+    "expo-localization": "^57.0.1",
     "expo-network": "~57.0.1",
     "expo-notifications": "~57.0.5",
     "expo-router": "~57.0.6",
@@ -28,9 +29,11 @@
     "expo-symbols": "~57.0.1",
     "expo-system-ui": "~57.0.1",
     "expo-web-browser": "~57.0.1",
+    "i18next": "^26.3.6",
     "ky": "^2.0.2",
     "react": "19.2.3",
     "react-dom": "19.2.3",
+    "react-i18next": "^17.0.11",
     "react-native": "0.86.0",
     "react-native-gesture-handler": "~2.32.0",
     "react-native-reanimated": "4.5.0",
diff --git a/mobile/src/features/insights/InsightsScreen.tsx b/mobile/src/features/insights/InsightsScreen.tsx
index cf884f1..c8e7fa8 100644
--- a/mobile/src/features/insights/InsightsScreen.tsx
+++ b/mobile/src/features/insights/InsightsScreen.tsx
@@ -1,5 +1,6 @@
 import { useFocusEffect, useRouter } from 'expo-router';
 import { useCallback, useState } from 'react';
+import { useTranslation } from 'react-i18next';
 import { StyleSheet, View } from 'react-native';
 
 import { todayInHongKong } from '@/domain/dates/hong-kong-today';
@@ -40,6 +41,7 @@ export function InsightsScreen({
   currentTime = currentDate,
 }: InsightsScreenProps) {
   const router = useRouter();
+  const { t } = useTranslation();
   const [state, setState] = useState<InsightsState>({ stage: 'loading' });
 
   const load = useCallback(async () => {
@@ -62,19 +64,19 @@ export function InsightsScreen({
 
   if (state.stage === 'loading') {
     return (
-      <Screen eyebrow="Insights · 數據洞察" title="Loading recorded activity">
-        <Skeleton label="Loading Insights" />
+      <Screen eyebrow={t('insights.eyebrow')} title={t('insights.title_loading')}>
+        <Skeleton label={t('insights.loading')} />
       </Screen>
     );
   }
   if (state.stage === 'error') {
     return (
-      <Screen eyebrow="Insights · 數據洞察" title="Insights are unavailable">
+      <Screen eyebrow={t('insights.eyebrow')} title={t('insights.title_error')}>
         <ErrorState
-          description="Recorded local activity could not be read. Nothing was changed."
+          description={t('insights.error_description')}
           onRetry={() => void load()}
-          retryLabel="Retry Insights"
-          title="Could not load Insights"
+          retryLabel={t('insights.error_retry')}
+          title={t('insights.error_title')}
         />
       </Screen>
     );
@@ -84,25 +86,23 @@ export function InsightsScreen({
   const totalEvents = summary.usedCount + summary.discardedCount;
   return (
     <Screen
-      eyebrow="Insights · 數據洞察"
+      eyebrow={t('insights.eyebrow')}
       testID="insights-screen"
-      title="Observed pantry activity">
-      <AppText>
-        Recorded actions only. FreshLoop does not estimate waste prevented or convert outcomes into savings.
-      </AppText>
+      title={t('insights.title')}>
+      <AppText>{t('insights.description')}</AppText>
       <View style={styles.counts}>
-        <CountCard count={summary.activeCount} label="Currently active" />
-        <CountCard count={summary.usedCount} label="Used recorded" />
-        <CountCard count={summary.discardedCount} label="Discarded recorded" />
+        <CountCard count={summary.activeCount} label={t('insights.active_count')} />
+        <CountCard count={summary.usedCount} label={t('insights.used_count')} />
+        <CountCard count={summary.discardedCount} label={t('insights.discarded_count')} />
       </View>
       <Card>
-        <AppText role="sectionTitle">Last seven days</AppText>
+        <AppText role="sectionTitle">{t('insights.last_seven_days')}</AppText>
         {totalEvents === 0 ? (
-          <AppText>No outcomes recorded yet. The chart remains at zero until you record an action.</AppText>
+          <AppText>{t('insights.no_outcomes')}</AppText>
         ) : null}
         <OutcomeBars days={summary.sevenDayOutcomes} />
       </Card>
-      <Button label="Return to Today" onPress={() => router.replace('/today')} variant="secondary" />
+      <Button label={t('insights.return_today')} onPress={() => router.replace('/today')} variant="secondary" />
     </Screen>
   );
 }
diff --git a/mobile/src/features/onboarding/OnboardingScreen.tsx b/mobile/src/features/onboarding/OnboardingScreen.tsx
index 756e247..0678ddd 100644
--- a/mobile/src/features/onboarding/OnboardingScreen.tsx
+++ b/mobile/src/features/onboarding/OnboardingScreen.tsx
@@ -1,3 +1,4 @@
+import { useTranslation } from 'react-i18next';
 import { StyleSheet, View } from 'react-native';
 
 import { colors, spacing } from '@/theme';
@@ -20,10 +21,11 @@ export function OnboardingScreen({
   onStartEmpty,
   onRetry,
 }: OnboardingScreenProps) {
+  const { t } = useTranslation();
   const busy = pendingChoice !== null;
 
   return (
-    <Screen eyebrow="Private by default" testID="onboarding-screen" title="Welcome to FreshLoop">
+    <Screen eyebrow={t('onboarding.eyebrow')} testID="onboarding-screen" title={t('onboarding.title')}>
       <Card>
         <View style={styles.cardHeader}>
           <AppIcon
@@ -33,11 +35,11 @@ export function OnboardingScreen({
             tintColor={colors.action}
           />
           <AppText role="sectionTitle" style={styles.cardTitle}>
-            Your pantry stays on this device
+            {t('onboarding.privacy_title')}
           </AppText>
         </View>
         <AppText style={styles.cardDescription}>
-          No login, cloud account, or network connection is required for the core pantry.
+          {t('onboarding.privacy_description')}
         </AppText>
       </Card>
       <Card>
@@ -49,24 +51,24 @@ export function OnboardingScreen({
             tintColor={colors.action}
           />
           <AppText role="sectionTitle" style={styles.cardTitle}>
-            Dates guide what to check
+            {t('onboarding.dates_title')}
           </AppText>
         </View>
         <AppText style={styles.cardDescription}>
-          Use By and Best Before mean different things. FreshLoop explains the date basis but never declares food safe.
+          {t('onboarding.dates_description')}
         </AppText>
       </Card>
       {errorMessage !== undefined && onRetry !== undefined ? (
         <ErrorState
           description={errorMessage}
           onRetry={onRetry}
-          retryLabel="Try again"
-          title="FreshLoop could not finish setup"
+          retryLabel={t('onboarding.error_retry')}
+          title={t('onboarding.error_title')}
         />
       ) : null}
       <Button
         disabled={busy && pendingChoice !== 'import_demo'}
-        label="Import Demo Data"
+        label={t('onboarding.import_demo')}
         loading={pendingChoice === 'import_demo'}
         onPress={onImportDemo}
         testID="onboarding-import-demo"
@@ -74,7 +76,7 @@ export function OnboardingScreen({
 
       <Button
         disabled={busy && pendingChoice !== 'start_empty'}
-        label="Start Empty"
+        label={t('onboarding.start_empty')}
         loading={pendingChoice === 'start_empty'}
         onPress={onStartEmpty}
         testID="onboarding-start-empty"
diff --git a/mobile/src/features/pantry/PantryScreen.tsx b/mobile/src/features/pantry/PantryScreen.tsx
index bc9a6b7..79bd516 100644
--- a/mobile/src/features/pantry/PantryScreen.tsx
+++ b/mobile/src/features/pantry/PantryScreen.tsx
@@ -1,5 +1,6 @@
 import { useFocusEffect, useRouter } from 'expo-router';
 import { useCallback, useMemo, useState } from 'react';
+import { useTranslation } from 'react-i18next';
 import { StyleSheet, View } from 'react-native';
 
 import type { FoodItem, FoodItemStatus } from '@/domain/items/types';
@@ -32,12 +33,14 @@ type PantryScreenProps = {
 
 type LoadStage = 'loading' | 'ready' | 'error';
 
-const STATUS_OPTIONS: readonly ChoiceOption<FoodItemStatus | 'all'>[] = [
-  { label: 'All', value: 'all' },
-  { label: 'Active', value: 'active' },
-  { label: 'Used', value: 'used' },
-  { label: 'Discarded', value: 'discarded' },
-];
+function useStatusOptions(t: (key: string) => string): readonly ChoiceOption<FoodItemStatus | 'all'>[] {
+  return [
+    { label: t('common.all'), value: 'all' },
+    { label: t('common.active'), value: 'active' },
+    { label: t('common.used'), value: 'used' },
+    { label: t('common.discarded'), value: 'discarded' },
+  ];
+}
 
 const INITIAL_FILTERS: PantryFilters = {
   search: '',
@@ -46,9 +49,9 @@ const INITIAL_FILTERS: PantryFilters = {
   status: 'all',
 };
 
-function optionsFor(values: readonly string[]): readonly ChoiceOption<string>[] {
+function optionsFor(values: readonly string[], tAll: string): readonly ChoiceOption<string>[] {
   return [
-    { label: 'All', value: 'all' },
+    { label: tAll, value: 'all' },
     ...[...new Set(values)].sort().map((value) => ({ label: value, value })),
   ];
 }
@@ -66,9 +69,11 @@ function badgeFor(item: FoodItem): 'unknown' | 'used' | 'discarded' {
 
 export function PantryScreen({ loadService = openPantryService }: PantryScreenProps) {
   const router = useRouter();
+  const { t } = useTranslation();
   const [stage, setStage] = useState<LoadStage>('loading');
   const [items, setItems] = useState<readonly FoodItem[]>([]);
   const [filters, setFilters] = useState<PantryFilters>(INITIAL_FILTERS);
+  const STATUS_OPTIONS = useStatusOptions(t);
 
   const load = useCallback(async () => {
     setStage('loading');
@@ -89,68 +94,68 @@ export function PantryScreen({ loadService = openPantryService }: PantryScreenPr
 
   const visibleItems = useMemo(() => filterPantryItems(items, filters), [filters, items]);
   const categoryOptions = useMemo(
-    () => optionsFor(items.map(({ category }) => category)),
-    [items],
+    () => optionsFor(items.map(({ category }) => category), t('common.all')),
+    [items, t],
   );
   const storageOptions = useMemo(
-    () => optionsFor(items.map(({ storageLocation }) => storageLocation)),
-    [items],
+    () => optionsFor(items.map(({ storageLocation }) => storageLocation), t('common.all')),
+    [items, t],
   );
 
   return (
     <Screen
-      eyebrow="Pantry · 儲藏室"
+      eyebrow={t('pantry.eyebrow')}
       testID="pantry-screen"
-      title="Everything you have">
-      <Button label="Add item" onPress={() => router.push('/item/add')} testID="pantry-add-item" />
+      title={t('pantry.title')}>
+      <Button label={t('pantry.add_item')} onPress={() => router.push('/item/add')} testID="pantry-add-item" />
       <FormField
-        accessibilityLabel="Search pantry"
-        helperText="Search English names or Traditional Chinese ingredient aliases."
-        label="Search"
+        accessibilityLabel={t('pantry.search_accessibility')}
+        helperText={t('pantry.search_helper')}
+        label={t('pantry.search_label')}
         onChangeText={(search) => setFilters((current) => ({ ...current, search }))}
         value={filters.search}
       />
       <ChoiceRow
-        label="Status"
+        label={t('pantry.filter_status')}
         onSelect={(status) => setFilters((current) => ({ ...current, status }))}
         options={STATUS_OPTIONS}
         selected={filters.status}
       />
       <ChoiceRow
-        label="Category"
+        label={t('pantry.filter_category')}
         onSelect={(category) => setFilters((current) => ({ ...current, category }))}
         options={categoryOptions}
         selected={filters.category}
       />
       <ChoiceRow
-        label="Storage"
+        label={t('pantry.filter_storage')}
         onSelect={(storageLocation) =>
           setFilters((current) => ({ ...current, storageLocation }))
         }
         options={storageOptions}
         selected={filters.storageLocation}
       />
-      {stage === 'loading' ? <Skeleton label="Loading pantry items" /> : null}
+      {stage === 'loading' ? <Skeleton label={t('pantry.loading')} /> : null}
       {stage === 'error' ? (
         <ErrorState
-          description="Local pantry data could not be read. Nothing was changed."
+          description={t('pantry.error_description')}
           onRetry={() => void load()}
-          retryLabel="Retry pantry"
-          title="Could not open Pantry"
+          retryLabel={t('pantry.error_retry')}
+          title={t('pantry.error_title')}
         />
       ) : null}
       {stage === 'ready' && visibleItems.length === 0 ? (
         <EmptyState
-          actionLabel={items.length === 0 ? 'Add your first item' : 'Clear filters'}
+          actionLabel={items.length === 0 ? t('pantry.empty_action') : t('pantry.no_match_action')}
           description={
             items.length === 0
-              ? 'Manual entry works offline and remains available without scanning.'
-              : 'No stored item matches the current search and filters.'
+              ? t('pantry.empty_description')
+              : t('pantry.no_match_description')
           }
           onAction={() =>
             items.length === 0 ? router.push('/item/add') : setFilters(INITIAL_FILTERS)
           }
-          title={items.length === 0 ? 'Your pantry is ready' : 'No matching items'}
+          title={items.length === 0 ? t('pantry.empty_title') : t('pantry.no_match_title')}
         />
       ) : null}
       {stage === 'ready' ? (
@@ -159,7 +164,7 @@ export function PantryScreen({ loadService = openPantryService }: PantryScreenPr
             const ingredient = ingredientFor(item);
             return (
               <Card
-                accessibilityLabel={`Open ${item.name} details`}
+                accessibilityLabel={t('pantry.open_item', { name: item.name })}
                 key={item.id.value}
                 onPress={() => router.push(`/item/${item.id.value}`)}
                 testID={`pantry-item-${item.id.value}`}>
diff --git a/mobile/src/features/rescue/RescueScreen.tsx b/mobile/src/features/rescue/RescueScreen.tsx
index 8775bf4..5f0fd3b 100644
--- a/mobile/src/features/rescue/RescueScreen.tsx
+++ b/mobile/src/features/rescue/RescueScreen.tsx
@@ -1,5 +1,6 @@
 import { useFocusEffect, useRouter } from 'expo-router';
 import { useCallback, useState } from 'react';
+import { useTranslation } from 'react-i18next';
 import { StyleSheet, View } from 'react-native';
 
 import { todayInHongKong } from '@/domain/dates/hong-kong-today';
@@ -31,6 +32,7 @@ export function RescueScreen({
   currentTime = currentDate,
 }: RescueScreenProps) {
   const router = useRouter();
+  const { t } = useTranslation();
   const [state, setState] = useState<RescueState>({ stage: 'loading' });
 
   const load = useCallback(async () => {
@@ -53,47 +55,47 @@ export function RescueScreen({
   );
 
   if (state.stage === 'loading') {
-    return <Screen eyebrow="Rescue · 拯救清單" title="Finding local matches"><Skeleton label="Ranking rescue recipes" /></Screen>;
+    return <Screen eyebrow={t('rescue.eyebrow')} title={t('rescue.title_loading')}><Skeleton label={t('rescue.loading')} /></Screen>;
   }
   if (state.stage === 'error') {
     return (
-      <Screen eyebrow="Rescue · 拯救清單" title="Rescue is unavailable">
-        <ErrorState description="Local pantry data could not be ranked. Nothing was changed." onRetry={() => void load()} retryLabel="Retry Rescue" title="Could not load Rescue" />
+      <Screen eyebrow={t('rescue.eyebrow')} title={t('rescue.title_error')}>
+        <ErrorState description={t('rescue.error_description')} onRetry={() => void load()} retryLabel={t('rescue.error_retry')} title={t('rescue.error_title')} />
       </Screen>
     );
   }
 
   const { view } = state;
   return (
-    <Screen eyebrow="Rescue · 拯救清單" testID="rescue-screen" title="Cook from what needs attention">
-      <AppText>Local recipes are ranked from date guidance, matched ingredients, missing ingredients, and cooking time.</AppText>
+    <Screen eyebrow={t('rescue.eyebrow')} testID="rescue-screen" title={t('rescue.title')}>
+      <AppText>{t('rescue.description')}</AppText>
       {view.blockedCount > 0 ? (
         <Card>
-          <AppText role="sectionTitle">Safety exclusions</AppText>
-          <AppText>{view.blockedCount} date-blocked {view.blockedCount === 1 ? 'item is' : 'items are'} excluded from every recipe.</AppText>
+          <AppText role="sectionTitle">{t('rescue.safety_title')}</AppText>
+          <AppText>{t(view.blockedCount === 1 ? 'rescue.safety_one' : 'rescue.safety_other', { count: view.blockedCount })}</AppText>
         </Card>
       ) : null}
       {view.conditionChecks.length > 0 ? (
         <View style={styles.section}>
-          <AppText role="sectionTitle">Check condition first</AppText>
-          <AppText>Past Best Before is quality guidance. Confirm condition on the item page; the confirmation expires at Hong Kong midnight.</AppText>
+          <AppText role="sectionTitle">{t('rescue.condition_title')}</AppText>
+          <AppText>{t('rescue.condition_description')}</AppText>
           {view.conditionChecks.map(({ item }) => (
             <Card key={item.id.value}>
-              <AppText>{`Check ${item.name} before Rescue can use it.`}</AppText>
-              <Button accessibilityLabel={`Check condition for ${item.name}`} label="Open condition check" onPress={() => router.push(`/item/${item.id.value}`)} variant="secondary" />
+              <AppText>{t('rescue.check_item', { name: item.name })}</AppText>
+              <Button accessibilityLabel={`${t('rescue.open_check')} ${item.name}`} label={t('rescue.open_check')} onPress={() => router.push(`/item/${item.id.value}`)} variant="secondary" />
             </Card>
           ))}
         </View>
       ) : null}
       {view.activeCount === 0 ? (
-        <EmptyState actionLabel="Add an item" description="Rescue only ranks active pantry items stored on this device." onAction={() => router.push('/item/add')} title="No active ingredients yet" />
+        <EmptyState actionLabel={t('rescue.empty_no_active_action')} description={t('rescue.empty_no_active_description')} onAction={() => router.push('/item/add')} title={t('rescue.empty_no_active_title')} />
       ) : null}
       {view.activeCount > 0 && view.matches.length === 0 ? (
-        <EmptyState actionLabel="Review Pantry" description="No recipe has an eligible pantry match with at most two missing non-staples. Check condition prompts or add ingredients." onAction={() => router.push('/pantry')} title="No local recipe matches yet" />
+        <EmptyState actionLabel={t('rescue.empty_no_match_action')} description={t('rescue.empty_no_match_description')} onAction={() => router.push('/pantry')} title={t('rescue.empty_no_match_title')} />
       ) : null}
       {view.matches.length > 0 ? (
         <View style={styles.section}>
-          <AppText role="sectionTitle">Ranked matches</AppText>
+          <AppText role="sectionTitle">{t('rescue.ranked_title')}</AppText>
           {view.matches.map((match) => (
             <RescueRecipeCard key={match.recipe.id.value} match={match} onPress={() => router.push(`/recipe/${match.recipe.id.value}`)} />
           ))}
diff --git a/mobile/src/features/settings/SettingsScreen.tsx b/mobile/src/features/settings/SettingsScreen.tsx
index afcf7cc..2d8d2dd 100644
--- a/mobile/src/features/settings/SettingsScreen.tsx
+++ b/mobile/src/features/settings/SettingsScreen.tsx
@@ -1,8 +1,12 @@
 import { useRouter } from 'expo-router';
-import { useEffect, useState, type ComponentType } from 'react';
+import { useCallback, useEffect, useState, type ComponentType } from 'react';
+import { useTranslation } from 'react-i18next';
 
 import type { NotificationLeadDays } from '@/data/repositories';
 import { ResetDemoDataCard } from '@/features/onboarding';
+import { getFreshLoopDatabase } from '@/data/database/expo-sqlite';
+import { SettingsRepository } from '@/data/repositories/settings';
+import { changeLanguage, type SupportedLanguage, SUPPORTED_LANGUAGES } from '@/i18n';
 import { AppText, Button, Card, ErrorState, Screen, Skeleton } from '@/ui';
 
 import { openSettingsService, type ReminderSettings, type SettingsServiceApi } from './service';
@@ -12,6 +16,12 @@ const DeveloperDiagnostics: ComponentType<DeveloperDiagnosticsProps> | undefined
   ? require('./DeveloperDiagnostics').DeveloperDiagnostics
   : undefined;
 
+const LANGUAGE_LABELS: Readonly<Record<SupportedLanguage, string>> = {
+  en: 'English',
+  'zh-CN': '简体中文',
+  'zh-TW': '繁體中文',
+};
+
 type SettingsScreenProps = {
   readonly isDevelopment: boolean;
   readonly loadService?: () => Promise<SettingsServiceApi>;
@@ -27,22 +37,20 @@ async function requestSettings(loadService: () => Promise<SettingsServiceApi>):
   return { service, settings: await service.load() };
 }
 
-const LEAD_LABELS: Readonly<Record<NotificationLeadDays, string>> = {
-  3: '3 days before',
-  1: '1 day before',
-  0: 'On the relevant date',
-};
-
 export function SettingsScreenView({
   isDevelopment,
   loadService = openSettingsService,
 }: SettingsScreenProps) {
   const router = useRouter();
+  const { t, i18n } = useTranslation();
   const [service, setService] = useState<SettingsServiceApi>();
   const [settings, setSettings] = useState<ReminderSettings>();
   const [error, setError] = useState(false);
   const [busy, setBusy] = useState(false);
   const [message, setMessage] = useState<string>();
+  const [langBusy, setLangBusy] = useState(false);
+
+  const currentLang = (i18n.language as SupportedLanguage) ?? 'en';
 
   async function reload(): Promise<void> {
     setError(false);
@@ -80,7 +88,7 @@ export function SettingsScreenView({
       setSettings(await service.load());
     } catch (updateError) {
       if (!(updateError instanceof Error)) throw updateError;
-      setMessage('The setting could not be updated. Existing local data is unchanged.');
+      setMessage(t('settings.update_error'));
     } finally {
       setBusy(false);
     }
@@ -90,38 +98,52 @@ export function SettingsScreenView({
     await update(async (loaded) => {
       const result = await loaded.scheduleDiagnostic();
       setMessage(result === 'permission_denied'
-        ? 'Notification permission is denied. The app remains fully usable.'
-        : 'Diagnostic scheduled for 15 seconds from now.');
+        ? t('settings.diagnostic_permission_denied')
+        : t('settings.diagnostic_scheduled'));
     });
   }
 
+  const handleChangeLanguage = useCallback(async (language: SupportedLanguage) => {
+    setLangBusy(true);
+    try {
+      const db = await getFreshLoopDatabase();
+      const store = new SettingsRepository(db);
+      await changeLanguage(language, store);
+    } catch {
+      await changeLanguage(language);
+    } finally {
+      setLangBusy(false);
+    }
+  }, []);
+
   if (error) {
-    return <Screen eyebrow="Settings & About" title="Could not load settings"><ErrorState description="Local settings could not be read." onRetry={() => void reload()} retryLabel="Retry settings" title="Settings unavailable" /></Screen>;
+    return <Screen eyebrow={t('settings.eyebrow')} title={t('settings.title_error')}><ErrorState description={t('settings.error_description')} onRetry={() => void reload()} retryLabel={t('settings.error_retry')} title={t('settings.error_title')} /></Screen>;
   }
   if (settings === undefined) {
-    return <Screen eyebrow="Settings & About" title="FreshLoop"><Skeleton label="Loading settings" /></Screen>;
+    return <Screen eyebrow={t('settings.eyebrow')} title={t('settings.title')}><Skeleton label={t('settings.loading')} /></Screen>;
   }
 
   return (
-    <Screen eyebrow="Settings & About" testID="settings-screen" title="FreshLoop">
+    <Screen eyebrow={t('settings.eyebrow')} testID="settings-screen" title={t('settings.title')}>
       <Card>
-        <AppText role="sectionTitle">Pantry reminders</AppText>
-        <AppText>Optional local reminders use the relevant date from FreshLoop’s date assessment.</AppText>
+        <AppText role="sectionTitle">{t('settings.reminders_title')}</AppText>
+        <AppText>{t('settings.reminders_description')}</AppText>
         <Button
-          accessibilityLabel={settings.enabled ? 'Disable reminders' : 'Enable reminders'}
-          label={settings.enabled ? 'Disable reminders' : 'Enable reminders'}
+          accessibilityLabel={settings.enabled ? t('settings.disable') : t('settings.enable')}
+          label={settings.enabled ? t('settings.disable') : t('settings.enable')}
           loading={busy}
           onPress={() => void update((loaded) => loaded.setEnabled(!settings.enabled))}
           variant={settings.enabled ? 'secondary' : 'primary'}
         />
         {([3, 1, 0] as const).map((lead) => {
           const selected = settings.leads.includes(lead);
+          const leadKey = `settings.lead_${lead === 0 ? '0' : lead === 1 ? '1' : '3'}` as const;
           return (
             <Button
-              accessibilityLabel={`${LEAD_LABELS[lead]} reminder ${selected ? 'enabled' : 'disabled'}`}
+              accessibilityLabel={`${t(leadKey)} ${t('settings.reminders_title')} ${selected ? t('settings.on') : t('settings.off')}`}
               disabled={!settings.enabled || busy}
               key={lead}
-              label={`${LEAD_LABELS[lead]} · ${selected ? 'On' : 'Off'}`}
+              label={`${t(leadKey)} · ${selected ? t('settings.on') : t('settings.off')}`}
               onPress={() => void update((loaded) => loaded.setLeadEnabled(lead, !selected))}
               variant={selected ? 'secondary' : 'quiet'}
             />
@@ -129,6 +151,18 @@ export function SettingsScreenView({
         })}
         {message === undefined ? null : <AppText accessibilityLiveRegion="polite">{message}</AppText>}
       </Card>
+      <Card>
+        <AppText role="sectionTitle">{t('settings.language_title')}</AppText>
+        {SUPPORTED_LANGUAGES.map((lang) => (
+          <Button
+            disabled={langBusy}
+            key={lang}
+            label={LANGUAGE_LABELS[lang]}
+            onPress={() => void handleChangeLanguage(lang)}
+            variant={lang === currentLang ? 'primary' : 'quiet'}
+          />
+        ))}
+      </Card>
       {isDevelopment && DeveloperDiagnostics !== undefined ? (
         <DeveloperDiagnostics
           busy={busy}
@@ -138,10 +172,10 @@ export function SettingsScreenView({
       ) : null}
       <ResetDemoDataCard />
       <Card>
-        <AppText role="sectionTitle">About this app</AppText>
-        <AppText>FreshLoop is a local-first pantry companion. It records observed outcomes and never claims that a date guarantees food safety.</AppText>
-        <AppText>Open Food Facts data is available under ODbL 1.0.</AppText>
-        <AppText role="meta">Your pantry data stays on this device.</AppText>
+        <AppText role="sectionTitle">{t('settings.about_title')}</AppText>
+        <AppText>{t('settings.about_line1')}</AppText>
+        <AppText>{t('settings.about_line2')}</AppText>
+        <AppText role="meta">{t('settings.about_meta')}</AppText>
       </Card>
     </Screen>
   );
diff --git a/mobile/src/features/settings/__tests__/screen.test.tsx b/mobile/src/features/settings/__tests__/screen.test.tsx
index 737a81d..73ee9df 100644
--- a/mobile/src/features/settings/__tests__/screen.test.tsx
+++ b/mobile/src/features/settings/__tests__/screen.test.tsx
@@ -7,6 +7,22 @@ const mockRouter = { replace: jest.fn(), push: jest.fn() };
 
 jest.mock('expo-router', () => ({ useRouter: () => mockRouter }));
 
+jest.mock('react-i18next', () => {
+  let i18n: { t: (key: string, opts?: Record<string, unknown>) => string } | undefined;
+  return {
+    useTranslation: () => {
+      if (i18n === undefined) {
+        // eslint-disable-next-line @typescript-eslint/no-require-imports
+        i18n = jest.requireActual('i18next');
+      }
+      return {
+        t: (key: string, opts?: Record<string, unknown>) => i18n!.t(key, opts ?? {}),
+        i18n: { language: 'en', changeLanguage: jest.fn() },
+      };
+    },
+  };
+});
+
 function fakeService(enabled = false): SettingsServiceApi {
   return {
     load: async () => ({ enabled, leads: [3, 1, 0] }),
diff --git a/mobile/src/features/today/TodayItemCard.tsx b/mobile/src/features/today/TodayItemCard.tsx
index 852131c..ed6baa0 100644
--- a/mobile/src/features/today/TodayItemCard.tsx
+++ b/mobile/src/features/today/TodayItemCard.tsx
@@ -1,10 +1,27 @@
+import { useTranslation } from 'react-i18next';
 import { StyleSheet, View } from 'react-native';
 
 import type { RankedTodayItem } from '@/domain/priority/today-priority';
+import type { SafetyCopyKey } from '@/domain/dates/assessment';
 import { spacing } from '@/theme';
 import { AppText, Badge, Button, Card } from '@/ui';
 
-import { TODAY_REASON_COPY } from './model';
+const REASON_KEY_MAP: Readonly<Record<SafetyCopyKey, string>> = {
+  use_by_future: 'dates.use_by_future',
+  use_by_today: 'dates.use_by_today',
+  use_by_passed: 'dates.use_by_passed',
+  best_before_future_quality: 'dates.best_before_future_quality',
+  best_before_today_quality: 'dates.best_before_today_quality',
+  best_before_passed_check: 'dates.best_before_passed_check',
+  best_before_passed_confirmed: 'dates.best_before_passed_confirmed',
+  opened_life_future: 'dates.opened_life_future',
+  opened_life_last_day: 'dates.opened_life_last_day',
+  opened_life_passed: 'dates.opened_life_passed',
+  user_estimate_future: 'dates.user_estimate_future',
+  user_estimate_today: 'dates.user_estimate_today',
+  user_estimate_passed: 'dates.user_estimate_passed',
+  unknown_date: 'dates.unknown_date',
+};
 
 type TodayItemCardProps = {
   readonly entry: RankedTodayItem;
@@ -12,29 +29,39 @@ type TodayItemCardProps = {
   readonly onRescue?: () => void;
 };
 
-function badgeFor(entry: RankedTodayItem): {
-  readonly label: string;
-  readonly variant: 'unknown' | 'later' | 'use-soon' | 'use-first';
-} {
+export function TodayItemCard({ entry, onOpen, onRescue }: TodayItemCardProps) {
+  const { t } = useTranslation();
+
+  let badgeLabel: string;
+  let badgeVariant: 'unknown' | 'later' | 'use-soon' | 'use-first';
   if (entry.assessment.rescueEligibility === 'condition_required') {
-    return { label: 'Check condition', variant: 'use-soon' };
+    badgeLabel = t('today.badge_check_condition');
+    badgeVariant = 'use-soon';
+  } else {
+    switch (entry.tier) {
+      case 'blocked':
+        badgeLabel = t('today.badge_check_remove');
+        badgeVariant = 'use-first';
+        break;
+      case 'critical':
+        badgeLabel = t('today.badge_use_first');
+        badgeVariant = 'use-soon';
+        break;
+      case 'urgent':
+        badgeLabel = t('today.badge_use_soon');
+        badgeVariant = 'use-soon';
+        break;
+      case 'soon':
+        badgeLabel = t('today.badge_coming_up');
+        badgeVariant = 'later';
+        break;
+      case 'watch':
+        badgeLabel = t('today.badge_no_urgency');
+        badgeVariant = 'unknown';
+        break;
+    }
   }
-  switch (entry.tier) {
-    case 'blocked':
-      return { label: 'Check / remove', variant: 'use-first' };
-    case 'critical':
-      return { label: 'Use first', variant: 'use-soon' };
-    case 'urgent':
-      return { label: 'Use soon', variant: 'use-soon' };
-    case 'soon':
-      return { label: 'Coming up', variant: 'later' };
-    case 'watch':
-      return { label: 'No urgency assumed', variant: 'unknown' };
-  }
-}
 
-export function TodayItemCard({ entry, onOpen, onRescue }: TodayItemCardProps) {
-  const badge = badgeFor(entry);
   return (
     <Card testID={`today-${entry.tier}-${entry.item.id.value}`}>
       <View style={styles.header}>
@@ -44,12 +71,12 @@ export function TodayItemCard({ entry, onOpen, onRescue }: TodayItemCardProps) {
             {entry.item.quantity} {entry.item.unit} · {entry.item.storageLocation}
           </AppText>
         </View>
-        <Badge label={badge.label} variant={badge.variant} />
+        <Badge label={badgeLabel} variant={badgeVariant} />
       </View>
-      <AppText>{TODAY_REASON_COPY[entry.reasonCode]}</AppText>
-      <Button label={`View ${entry.item.name}`} onPress={onOpen} testID={`today-view-${entry.item.id.value}`} variant="secondary" />
+      <AppText>{t(REASON_KEY_MAP[entry.reasonCode])}</AppText>
+      <Button label={t('today.view_item', { name: entry.item.name })} onPress={onOpen} testID={`today-view-${entry.item.id.value}`} variant="secondary" />
       {onRescue === undefined ? null : (
-        <Button label={`Rescue ${entry.item.name}`} onPress={onRescue} testID={`today-rescue-${entry.item.id.value}`} variant="quiet" />
+        <Button label={t('today.rescue_item', { name: entry.item.name })} onPress={onRescue} testID={`today-rescue-${entry.item.id.value}`} variant="quiet" />
       )}
     </Card>
   );
diff --git a/mobile/src/features/today/TodayScreen.tsx b/mobile/src/features/today/TodayScreen.tsx
index d622503..b1a8f48 100644
--- a/mobile/src/features/today/TodayScreen.tsx
+++ b/mobile/src/features/today/TodayScreen.tsx
@@ -1,5 +1,6 @@
 import { useFocusEffect, useRouter } from 'expo-router';
 import { useCallback, useState } from 'react';
+import { useTranslation } from 'react-i18next';
 import { StyleSheet, View } from 'react-native';
 
 import { todayInHongKong } from '@/domain/dates/hong-kong-today';
@@ -67,6 +68,7 @@ export function TodayScreen({
   currentTime = currentDate,
 }: TodayScreenProps) {
   const router = useRouter();
+  const { t } = useTranslation();
   const [state, setState] = useState<TodayState>({ stage: 'loading' });
 
   const load = useCallback(async () => {
@@ -93,19 +95,19 @@ export function TodayScreen({
 
   if (state.stage === 'loading') {
     return (
-      <Screen eyebrow="Today · 今日" title="Loading today's priorities">
-        <Skeleton label="Loading Today" />
+      <Screen eyebrow={t('today.eyebrow_loading')} title={t('today.title_loading')}>
+        <Skeleton label={t('today.title_loading')} />
       </Screen>
     );
   }
   if (state.stage === 'error') {
     return (
-      <Screen eyebrow="Today · 今日" title="Today is unavailable">
+      <Screen eyebrow={t('today.eyebrow_loading')} title={t('today.title_error')}>
         <ErrorState
-          description="Local pantry data could not be read. Nothing was changed."
+          description={t('today.error_description')}
           onRetry={() => void load()}
-          retryLabel="Retry Today"
-          title="Could not load Today"
+          retryLabel={t('today.error_retry')}
+          title={t('today.error_title')}
         />
       </Screen>
     );
@@ -113,38 +115,40 @@ export function TodayScreen({
 
   const { dashboard, date } = state;
   const hasItems = dashboard.checkRequired.length + dashboard.actionable.length > 0;
+  const greeting = greetingForHour(Number(new Intl.DateTimeFormat('en-GB', { timeZone: 'Asia/Hong_Kong', hour: '2-digit', hourCycle: 'h23' }).format(date)));
+  const greetingKey = greeting === 'Good morning' ? 'today.greeting_morning' : greeting === 'Good afternoon' ? 'today.greeting_afternoon' : 'today.greeting_evening';
   return (
     <Screen
-      eyebrow={`${formatHongKongDay(date)} · Today`}
+      eyebrow={t('today.eyebrow', { day: formatHongKongDay(date) })}
       testID="today-screen"
-      title={`${greetingForHour(Number(new Intl.DateTimeFormat('en-GB', { timeZone: 'Asia/Hong_Kong', hour: '2-digit', hourCycle: 'h23' }).format(date)))}. What should I check first?`}>
-      <Button label="Add item" onPress={() => router.push('/item/add')} testID="today-add-item" />
+      title={t('today.title_ready', { greeting: t(greetingKey) })}>
+      <Button label={t('today.add_item')} onPress={() => router.push('/item/add')} testID="today-add-item" />
       {!hasItems ? (
         <EmptyState
-          actionLabel="Add your first item"
-          description="Add a local pantry item to receive explainable date guidance."
+          actionLabel={t('today.empty_action')}
+          description={t('today.empty_description')}
           onAction={() => router.push('/item/add')}
-          title="Nothing to rank yet"
+          title={t('today.empty_title')}
         />
       ) : null}
       {hasItems && !dashboard.hasDatedItems ? (
         <Card>
-          <AppText role="sectionTitle">No dated items</AppText>
-          <AppText>No urgency is assumed. Check labels and condition when you use these items.</AppText>
+          <AppText role="sectionTitle">{t('today.no_dated_title')}</AppText>
+          <AppText>{t('today.no_dated_description')}</AppText>
         </Card>
       ) : null}
       <Section
-        description="These items are kept out of Rescue. Open the item to check, confirm, use, discard, or remove it."
+        description={t('today.check_section_description')}
         entries={dashboard.checkRequired}
         onOpen={open}
-        title="Check or remove"
+        title={t('today.check_section_title')}
       />
       <Section
-        description="Ordered by the relevant date and explicit assessment reason."
+        description={t('today.use_section_description')}
         entries={dashboard.actionable}
         onOpen={open}
         onRescue={() => router.push('/rescue')}
-        title="Use next"
+        title={t('today.use_section_title')}
       />
     </Screen>
   );
diff --git a/mobile/src/i18n/index.ts b/mobile/src/i18n/index.ts
new file mode 100644
index 0000000..5a29d49
--- /dev/null
+++ b/mobile/src/i18n/index.ts
@@ -0,0 +1,81 @@
+import i18next from 'i18next';
+import { initReactI18next } from 'react-i18next';
+import { getLocales } from 'expo-localization';
+
+import en from './locales/en.json';
+import zhCN from './locales/zh-CN.json';
+import zhTW from './locales/zh-TW.json';
+
+export type SupportedLanguage = 'en' | 'zh-CN' | 'zh-TW';
+
+export const SUPPORTED_LANGUAGES: readonly SupportedLanguage[] = ['en', 'zh-CN', 'zh-TW'];
+
+export const LANGUAGE_KEY = 'app.language';
+
+const resources = {
+  en: { translation: en },
+  'zh-CN': { translation: zhCN },
+  'zh-TW': { translation: zhTW },
+} as const;
+
+export function deviceLanguage(): SupportedLanguage {
+  const locales = getLocales();
+  if (locales.length === 0) return 'en';
+  const tag = locales[0]?.languageTag ?? 'en';
+  if (tag.startsWith('zh-Hans') || tag.startsWith('zh-CN')) return 'zh-CN';
+  if (tag.startsWith('zh-Hant') || tag.startsWith('zh-TW') || tag.startsWith('zh-HK')) return 'zh-TW';
+  return 'en';
+}
+
+export function isSupportedLanguage(value: string): value is SupportedLanguage {
+  return (SUPPORTED_LANGUAGES as readonly string[]).includes(value);
+}
+
+export type LanguageReader = {
+  get(key: string): Promise<string | null>;
+};
+
+export type LanguageWriter = {
+  set(key: string, value: string): Promise<void>;
+};
+
+export type LanguageStore = LanguageReader & LanguageWriter;
+
+export async function initI18n(store?: LanguageStore): Promise<SupportedLanguage> {
+  let language: SupportedLanguage = 'en';
+
+  if (store !== undefined) {
+    const stored = await store.get(LANGUAGE_KEY);
+    if (stored !== null && isSupportedLanguage(stored)) {
+      language = stored;
+    }
+  }
+
+  if (language === 'en') {
+    language = deviceLanguage();
+  }
+
+  void i18next.use(initReactI18next).init({
+    compatibilityJSON: 'v4',
+    resources,
+    lng: language,
+    fallbackLng: 'en',
+    interpolation: { escapeValue: false },
+    returnNull: false,
+    returnEmptyString: false,
+  });
+
+  return language;
+}
+
+export async function changeLanguage(
+  language: SupportedLanguage,
+  store?: LanguageWriter,
+): Promise<void> {
+  await i18next.changeLanguage(language);
+  if (store !== undefined) {
+    await store.set(LANGUAGE_KEY, language);
+  }
+}
+
+export default i18next;
diff --git a/mobile/src/i18n/locales/en.json b/mobile/src/i18n/locales/en.json
new file mode 100644
index 0000000..17b6c81
--- /dev/null
+++ b/mobile/src/i18n/locales/en.json
@@ -0,0 +1,242 @@
+{
+  "common": {
+    "all": "All",
+    "active": "Active",
+    "used": "Used",
+    "discarded": "Discarded",
+    "retry": "Try again",
+    "loading": "Loading"
+  },
+  "tabs": {
+    "today": "Today",
+    "pantry": "Pantry",
+    "rescue": "Rescue",
+    "insights": "Insights",
+    "settings": "Settings"
+  },
+  "today": {
+    "eyebrow_loading": "Today · 今日",
+    "eyebrow": "{{day}} · Today",
+    "title_loading": "Loading today's priorities",
+    "title_ready": "{{greeting}}. What should I check first?",
+    "title_error": "Today is unavailable",
+    "error_description": "Local pantry data could not be read. Nothing was changed.",
+    "error_retry": "Retry Today",
+    "error_title": "Could not load Today",
+    "add_item": "Add item",
+    "empty_action": "Add your first item",
+    "empty_description": "Add a local pantry item to receive explainable date guidance.",
+    "empty_title": "Nothing to rank yet",
+    "no_dated_title": "No dated items",
+    "no_dated_description": "No urgency is assumed. Check labels and condition when you use these items.",
+    "check_section_title": "Check or remove",
+    "check_section_description": "These items are kept out of Rescue. Open the item to check, confirm, use, discard, or remove it.",
+    "use_section_title": "Use next",
+    "use_section_description": "Ordered by the relevant date and explicit assessment reason.",
+    "greeting_morning": "Good morning",
+    "greeting_afternoon": "Good afternoon",
+    "greeting_evening": "Good evening",
+    "badge_check_condition": "Check condition",
+    "badge_check_remove": "Check / remove",
+    "badge_use_first": "Use first",
+    "badge_use_soon": "Use soon",
+    "badge_coming_up": "Coming up",
+    "badge_no_urgency": "No urgency assumed",
+    "view_item": "View {{name}}",
+    "rescue_item": "Rescue {{name}}"
+  },
+  "dates": {
+    "use_by_future": "Use By is approaching. Follow the pack instructions.",
+    "use_by_today": "Use By today. Follow the pack instructions.",
+    "use_by_passed": "Use By has passed. Check or remove this item; Rescue is unavailable.",
+    "best_before_future_quality": "Best Before is a quality date.",
+    "best_before_today_quality": "Best Before today refers to quality.",
+    "best_before_passed_check": "Best Before has passed. Check and confirm the condition today.",
+    "best_before_passed_confirmed": "Condition confirmed today after Best Before.",
+    "opened_life_future": "The stated opened-life window is active.",
+    "opened_life_last_day": "Last day of the stated opened-life window.",
+    "opened_life_passed": "The stated opened-life window has passed. Rescue is unavailable.",
+    "user_estimate_future": "Your estimated date is approaching.",
+    "user_estimate_today": "Your estimated date is today.",
+    "user_estimate_passed": "Your estimated date has passed. Check the item yourself.",
+    "unknown_date": "No date is recorded. Check the pack and condition without assuming urgency."
+  },
+  "pantry": {
+    "eyebrow": "Pantry · 儲藏室",
+    "title": "Everything you have",
+    "add_item": "Add item",
+    "search_accessibility": "Search pantry",
+    "search_helper": "Search English names or Traditional Chinese ingredient aliases.",
+    "search_label": "Search",
+    "filter_status": "Status",
+    "filter_category": "Category",
+    "filter_storage": "Storage",
+    "loading": "Loading pantry items",
+    "error_description": "Local pantry data could not be read. Nothing was changed.",
+    "error_retry": "Retry pantry",
+    "error_title": "Could not open Pantry",
+    "empty_action": "Add your first item",
+    "empty_description": "Manual entry works offline and remains available without scanning.",
+    "empty_title": "Your pantry is ready",
+    "no_match_action": "Clear filters",
+    "no_match_description": "No stored item matches the current search and filters.",
+    "no_match_title": "No matching items",
+    "open_item": "Open {{name}} details"
+  },
+  "rescue": {
+    "eyebrow": "Rescue · 拯救清單",
+    "title": "Cook from what needs attention",
+    "title_loading": "Finding local matches",
+    "title_error": "Rescue is unavailable",
+    "loading": "Ranking rescue recipes",
+    "error_description": "Local pantry data could not be ranked. Nothing was changed.",
+    "error_retry": "Retry Rescue",
+    "error_title": "Could not load Rescue",
+    "description": "Local recipes are ranked from date guidance, matched ingredients, missing ingredients, and cooking time.",
+    "safety_title": "Safety exclusions",
+    "safety_one": "{{count}} date-blocked item is excluded from every recipe.",
+    "safety_other": "{{count}} date-blocked items are excluded from every recipe.",
+    "condition_title": "Check condition first",
+    "condition_description": "Past Best Before is quality guidance. Confirm condition on the item page; the confirmation expires at Hong Kong midnight.",
+    "check_item": "Check {{name}} before Rescue can use it.",
+    "open_check": "Open condition check",
+    "empty_no_active_title": "No active ingredients yet",
+    "empty_no_active_action": "Add an item",
+    "empty_no_active_description": "Rescue only ranks active pantry items stored on this device.",
+    "empty_no_match_title": "No local recipe matches yet",
+    "empty_no_match_action": "Review Pantry",
+    "empty_no_match_description": "No recipe has an eligible pantry match with at most two missing non-staples. Check condition prompts or add ingredients.",
+    "ranked_title": "Ranked matches"
+  },
+  "insights": {
+    "eyebrow": "Insights · 數據洞察",
+    "title": "Observed pantry activity",
+    "title_loading": "Loading recorded activity",
+    "title_error": "Insights are unavailable",
+    "loading": "Loading Insights",
+    "error_description": "Recorded local activity could not be read. Nothing was changed.",
+    "error_retry": "Retry Insights",
+    "error_title": "Could not load Insights",
+    "description": "Recorded actions only. FreshLoop does not estimate waste prevented or convert outcomes into savings.",
+    "active_count": "Currently active",
+    "used_count": "Used recorded",
+    "discarded_count": "Discarded recorded",
+    "last_seven_days": "Last seven days",
+    "no_outcomes": "No outcomes recorded yet. The chart remains at zero until you record an action.",
+    "return_today": "Return to Today"
+  },
+  "settings": {
+    "eyebrow": "Settings & About",
+    "title": "FreshLoop",
+    "title_error": "Could not load settings",
+    "error_description": "Local settings could not be read.",
+    "error_retry": "Retry settings",
+    "error_title": "Settings unavailable",
+    "loading": "Loading settings",
+    "reminders_title": "Pantry reminders",
+    "reminders_description": "Optional local reminders use the relevant date from FreshLoop's date assessment.",
+    "enable": "Enable reminders",
+    "disable": "Disable reminders",
+    "lead_3": "3 days before",
+    "lead_1": "1 day before",
+    "lead_0": "On the relevant date",
+    "on": "On",
+    "off": "Off",
+    "update_error": "The setting could not be updated. Existing local data is unchanged.",
+    "diagnostic_permission_denied": "Notification permission is denied. The app remains fully usable.",
+    "diagnostic_scheduled": "Diagnostic scheduled for 15 seconds from now.",
+    "language_title": "Language",
+    "language_en": "English",
+    "language_zh_cn": "简体中文",
+    "language_zh_tw": "繁體中文",
+    "about_title": "About this app",
+    "about_line1": "FreshLoop is a local-first pantry companion. It records observed outcomes and never claims that a date guarantees food safety.",
+    "about_line2": "Open Food Facts data is available under ODbL 1.0.",
+    "about_meta": "Your pantry data stays on this device."
+  },
+  "onboarding": {
+    "eyebrow": "Private by default",
+    "title": "Welcome to FreshLoop",
+    "privacy_title": "Your pantry stays on this device",
+    "privacy_description": "No login, cloud account, or network connection is required for the core pantry.",
+    "dates_title": "Dates guide what to check",
+    "dates_description": "Use By and Best Before mean different things. FreshLoop explains the date basis but never declares food safe.",
+    "error_title": "FreshLoop could not finish setup",
+    "error_retry": "Try again",
+    "import_demo": "Import Demo Data",
+    "start_empty": "Start Empty"
+  },
+  "itemDetail": {
+    "eyebrow": "Item detail · 食材詳情",
+    "title_loading": "Loading item",
+    "loading": "Loading item details",
+    "title_missing": "Item not found",
+    "missing_description": "This item no longer exists in local storage.",
+    "missing_action": "Back to Pantry",
+    "error_title": "Missing item",
+    "edit": "Edit",
+    "delete": "Delete",
+    "confirm_use": "Mark Used",
+    "confirm_discard": "Mark Discarded",
+    "undo": "Undo",
+    "undo_time": "Undo available",
+    "status": "Status",
+    "quantity": "{{qty}} {{unit}}",
+    "date_basis": "Date basis",
+    "printed_date": "Printed date",
+    "opened_on": "Opened on",
+    "storage": "Storage",
+    "category": "Category",
+    "notes": "Notes",
+    "barcode": "Barcode",
+    "none": "None"
+  },
+  "addEdit": {
+    "add_title": "Add item",
+    "edit_title": "Edit item",
+    "name_label": "Name",
+    "name_error": "Enter an item name.",
+    "ingredient_label": "Ingredient",
+    "ingredient_error": "Choose a known ingredient or alias.",
+    "quantity_label": "Quantity",
+    "quantity_error": "Enter a positive number.",
+    "unit_label": "Unit",
+    "category_label": "Category",
+    "storage_label": "Storage",
+    "date_basis_label": "Date basis",
+    "printed_date_label": "Printed date",
+    "opened_on_label": "Opened on",
+    "opened_life_label": "Opened-life days",
+    "notes_label": "Notes",
+    "save": "Save",
+    "save_error": "Could not save item. Check the form and try again.",
+    "scan": "Scan barcode"
+  },
+  "scanner": {
+    "title": "Add item",
+    "scan_prompt": "Scan a barcode",
+    "offline": "Product lookup is unavailable offline. Enter the details manually below.",
+    "permission_denied": "Camera permission is needed to scan barcodes. Enter details manually.",
+    "manual": "Enter manually"
+  },
+  "recipe": {
+    "detail_title": "Recipe detail",
+    "matched": "Matched",
+    "missing": "Missing",
+    "staples": "Staples",
+    "steps": "Steps",
+    "cooking_time": "{{minutes}} minutes",
+    "difficulty": "Difficulty",
+    "disclaimer": "This recipe is a local suggestion. Check all ingredients for allergens and freshness before cooking."
+  },
+  "outcomes": {
+    "used": "Used",
+    "discarded": "Discarded",
+    "confirm_used": "Mark this item as used?",
+    "confirm_discarded": "Mark this item as discarded?",
+    "undo_success": "Outcome undone.",
+    "used_recorded": "Marked as used",
+    "discarded_recorded": "Marked as discarded",
+    "discard_reason": "Why discarded? (optional)"
+  }
+}
diff --git a/mobile/src/i18n/locales/zh-CN.json b/mobile/src/i18n/locales/zh-CN.json
new file mode 100644
index 0000000..bdaa65b
--- /dev/null
+++ b/mobile/src/i18n/locales/zh-CN.json
@@ -0,0 +1,242 @@
+{
+  "common": {
+    "all": "全部",
+    "active": "在用",
+    "used": "已用",
+    "discarded": "已弃",
+    "retry": "重试",
+    "loading": "加载中"
+  },
+  "tabs": {
+    "today": "今日",
+    "pantry": "储藏室",
+    "rescue": "拯救",
+    "insights": "洞察",
+    "settings": "设置"
+  },
+  "today": {
+    "eyebrow_loading": "今日 · Today",
+    "eyebrow": "{{day}} · 今日",
+    "title_loading": "正在加载今日优先级",
+    "title_ready": "{{greeting}}。先从哪开始？",
+    "title_error": "今日不可用",
+    "error_description": "无法读取本地储藏室数据，未做任何更改。",
+    "error_retry": "重试今日",
+    "error_title": "无法加载今日",
+    "add_item": "添加食材",
+    "empty_action": "添加第一个食材",
+    "empty_description": "添加本地储藏食材，获取可解释的日期指引。",
+    "empty_title": "暂无排序数据",
+    "no_dated_title": "无标注日期的食材",
+    "no_dated_description": "不假定任何紧迫性。使用前请检查标签和状态。",
+    "check_section_title": "检查或移除",
+    "check_section_description": "这些食材已排除在拯救之外。打开查看、确认、使用、丢弃或移除。",
+    "use_section_title": "优先使用",
+    "use_section_description": "按相关日期和明确的评估原因排序。",
+    "greeting_morning": "早上好",
+    "greeting_afternoon": "下午好",
+    "greeting_evening": "晚上好",
+    "badge_check_condition": "检查状态",
+    "badge_check_remove": "检查 / 移除",
+    "badge_use_first": "优先使用",
+    "badge_use_soon": "尽快使用",
+    "badge_coming_up": "临近",
+    "badge_no_urgency": "无紧迫性",
+    "view_item": "查看 {{name}}",
+    "rescue_item": "拯救 {{name}}"
+  },
+  "dates": {
+    "use_by_future": "保质期临近。请遵循包装说明。",
+    "use_by_today": "今日为保质期截止日。请遵循包装说明。",
+    "use_by_passed": "已过保质期。请检查或移除此食材，拯救功能不可用。",
+    "best_before_future_quality": "此日期为品质参考。",
+    "best_before_today_quality": "今日为最佳食用期，属品质参考。",
+    "best_before_passed_check": "已过最佳食用期。请今日检查并确认状态。",
+    "best_before_passed_confirmed": "已过最佳食用期后今日已确认状态。",
+    "opened_life_future": "开封后保质期内。",
+    "opened_life_last_day": "开封后保质期最后一天。",
+    "opened_life_passed": "已过开封后保质期。拯救功能不可用。",
+    "user_estimate_future": "您的预估日期临近。",
+    "user_estimate_today": "您的预估日期是今天。",
+    "user_estimate_passed": "您的预估日期已过。请自行检查。",
+    "unknown_date": "未记录日期。请自行检查包装和状态，不要假设紧迫性。"
+  },
+  "pantry": {
+    "eyebrow": "储藏室 · Pantry",
+    "title": "所有食材",
+    "add_item": "添加食材",
+    "search_accessibility": "搜索储藏室",
+    "search_helper": "可搜索英文名称或简体中文食材别名。",
+    "search_label": "搜索",
+    "filter_status": "状态",
+    "filter_category": "类别",
+    "filter_storage": "存放位置",
+    "loading": "加载储藏室食材",
+    "error_description": "无法读取本地储藏室数据，未做任何更改。",
+    "error_retry": "重试储藏室",
+    "error_title": "无法打开储藏室",
+    "empty_action": "添加第一个食材",
+    "empty_description": "手动录入支持离线使用，无需扫描即可添加。",
+    "empty_title": "储藏室已准备就绪",
+    "no_match_action": "清除筛选",
+    "no_match_description": "没有食材匹配当前搜索和筛选条件。",
+    "no_match_title": "无匹配食材",
+    "open_item": "打开 {{name}} 详情"
+  },
+  "rescue": {
+    "eyebrow": "拯救 · Rescue",
+    "title": "按需烹饪",
+    "title_loading": "正在寻找本地匹配",
+    "title_error": "拯救不可用",
+    "loading": "正在排序拯救食谱",
+    "error_description": "无法对本地储藏室数据排序，未做任何更改。",
+    "error_retry": "重试拯救",
+    "error_title": "无法加载拯救",
+    "description": "本地食谱按日期指引、匹配食材、缺少食材和烹饪时间进行排序。",
+    "safety_title": "安全排除",
+    "safety_one": "{{count}} 个日期受限食材已从所有食谱中排除。",
+    "safety_other": "{{count}} 个日期受限食材已从所有食谱中排除。",
+    "condition_title": "请先检查状态",
+    "condition_description": "已过最佳食用期仅为品质指引。请在食材页面确认状态；确认将在香港时间午夜失效。",
+    "check_item": "请先检查 {{name}}，之后拯救功能才可使用。",
+    "open_check": "打开状态检查",
+    "empty_no_active_title": "暂无可用食材",
+    "empty_no_active_action": "添加食材",
+    "empty_no_active_description": "拯救仅对存储在此设备上的在用食材进行排序。",
+    "empty_no_match_title": "暂无本地食谱匹配",
+    "empty_no_match_action": "查看储藏室",
+    "empty_no_match_description": "没有食谱满足最多缺少两种非主食的匹配条件。请检查状态提示或添加食材。",
+    "ranked_title": "排序匹配"
+  },
+  "insights": {
+    "eyebrow": "洞察 · Insights",
+    "title": "观察到的储藏活动",
+    "title_loading": "正在加载活动记录",
+    "title_error": "洞察不可用",
+    "loading": "加载洞察数据",
+    "error_description": "无法读取记录的活动数据，未做任何更改。",
+    "error_retry": "重试洞察",
+    "error_title": "无法加载洞察",
+    "description": "仅为记录的行为。FreshLoop 不估算减少的浪费或将结果转换为节省。",
+    "active_count": "当前在用",
+    "used_count": "已使用记录",
+    "discarded_count": "已丢弃记录",
+    "last_seven_days": "最近七天",
+    "no_outcomes": "暂无结果记录。图表会保持为零，直到您记录操作。",
+    "return_today": "返回今日"
+  },
+  "settings": {
+    "eyebrow": "设置与关于",
+    "title": "FreshLoop",
+    "title_error": "无法加载设置",
+    "error_description": "无法读取本地设置。",
+    "error_retry": "重试设置",
+    "error_title": "设置不可用",
+    "loading": "加载设置中",
+    "reminders_title": "储藏室提醒",
+    "reminders_description": "可选本地提醒使用 FreshLoop 日期评估中的相关日期。",
+    "enable": "启用提醒",
+    "disable": "禁用提醒",
+    "lead_3": "提前3天",
+    "lead_1": "提前1天",
+    "lead_0": "当天",
+    "on": "开",
+    "off": "关",
+    "update_error": "无法更新设置。现有本地数据未更改。",
+    "diagnostic_permission_denied": "通知权限已拒绝。应用仍可正常使用。",
+    "diagnostic_scheduled": "诊断通知已安排在15秒后。",
+    "language_title": "语言",
+    "language_en": "English",
+    "language_zh_cn": "简体中文",
+    "language_zh_tw": "繁體中文",
+    "about_title": "关于此应用",
+    "about_line1": "FreshLoop 是一款本地优先的储藏室助手。它记录观察到的结果，绝不声称日期能保证食品安全。",
+    "about_line2": "Open Food Facts 数据基于 ODbL 1.0 许可提供。",
+    "about_meta": "您的储藏室数据仅存储在此设备上。"
+  },
+  "onboarding": {
+    "eyebrow": "默认隐私保护",
+    "title": "欢迎使用 FreshLoop",
+    "privacy_title": "您的储藏室仅在此设备上",
+    "privacy_description": "无需登录、云账户或网络连接即可使用核心储藏室功能。",
+    "dates_title": "日期指引检查内容",
+    "dates_description": "保质期和最佳食用期含义不同。FreshLoop 解释日期依据，但绝不宣称食品安全。",
+    "error_title": "FreshLoop 无法完成设置",
+    "error_retry": "重试",
+    "import_demo": "导入演示数据",
+    "start_empty": "从零开始"
+  },
+  "itemDetail": {
+    "eyebrow": "食材详情 · Item detail",
+    "title_loading": "加载食材",
+    "loading": "加载食材详情",
+    "title_missing": "食材未找到",
+    "missing_description": "该食材已不在本地存储中。",
+    "missing_action": "返回储藏室",
+    "error_title": "缺少食材",
+    "edit": "编辑",
+    "delete": "删除",
+    "confirm_use": "标记已使用",
+    "confirm_discard": "标记已丢弃",
+    "undo": "撤销",
+    "undo_time": "可撤销",
+    "status": "状态",
+    "quantity": "{{qty}} {{unit}}",
+    "date_basis": "日期依据",
+    "printed_date": "包装日期",
+    "opened_on": "开封日期",
+    "storage": "存放位置",
+    "category": "类别",
+    "notes": "备注",
+    "barcode": "条码",
+    "none": "无"
+  },
+  "addEdit": {
+    "add_title": "添加食材",
+    "edit_title": "编辑食材",
+    "name_label": "名称",
+    "name_error": "请输入食材名称。",
+    "ingredient_label": "食材",
+    "ingredient_error": "请选择已知食材或别名。",
+    "quantity_label": "数量",
+    "quantity_error": "请输入正数。",
+    "unit_label": "单位",
+    "category_label": "类别",
+    "storage_label": "存放位置",
+    "date_basis_label": "日期依据",
+    "printed_date_label": "包装日期",
+    "opened_on_label": "开封日期",
+    "opened_life_label": "开封后保质天数",
+    "notes_label": "备注",
+    "save": "保存",
+    "save_error": "无法保存食材。请检查表单并重试。",
+    "scan": "扫描条码"
+  },
+  "scanner": {
+    "title": "添加食材",
+    "scan_prompt": "扫描条码",
+    "offline": "离线状态下无法查询产品信息。请在下方手动输入详情。",
+    "permission_denied": "扫描条码需要相机权限。请手动输入详情。",
+    "manual": "手动输入"
+  },
+  "recipe": {
+    "detail_title": "食谱详情",
+    "matched": "已有",
+    "missing": "缺少",
+    "staples": "主食",
+    "steps": "步骤",
+    "cooking_time": "{{minutes}} 分钟",
+    "difficulty": "难度",
+    "disclaimer": "此食谱为本地建议。请在使用前检查所有食材的过敏原和新鲜程度。"
+  },
+  "outcomes": {
+    "used": "已用",
+    "discarded": "已弃",
+    "confirm_used": "将此食材标记为已使用？",
+    "confirm_discarded": "将此食材标记为已丢弃？",
+    "undo_success": "结果已撤销。",
+    "used_recorded": "已标记为使用",
+    "discarded_recorded": "已标记为丢弃",
+    "discard_reason": "丢弃原因（选填）"
+  }
+}
diff --git a/mobile/src/i18n/locales/zh-TW.json b/mobile/src/i18n/locales/zh-TW.json
new file mode 100644
index 0000000..29a4cd4
--- /dev/null
+++ b/mobile/src/i18n/locales/zh-TW.json
@@ -0,0 +1,242 @@
+{
+  "common": {
+    "all": "全部",
+    "active": "在用",
+    "used": "已用",
+    "discarded": "已棄",
+    "retry": "重試",
+    "loading": "載入中"
+  },
+  "tabs": {
+    "today": "今日",
+    "pantry": "儲藏室",
+    "rescue": "拯救",
+    "insights": "洞察",
+    "settings": "設定"
+  },
+  "today": {
+    "eyebrow_loading": "今日 · Today",
+    "eyebrow": "{{day}} · 今日",
+    "title_loading": "正在載入今日優先級",
+    "title_ready": "{{greeting}}。先從哪開始？",
+    "title_error": "今日不可用",
+    "error_description": "無法讀取本地儲藏室數據，未做任何更改。",
+    "error_retry": "重試今日",
+    "error_title": "無法載入今日",
+    "add_item": "添加食材",
+    "empty_action": "添加第一個食材",
+    "empty_description": "添加本地儲藏食材，獲取可解釋的日期指引。",
+    "empty_title": "暫無排序數據",
+    "no_dated_title": "無標註日期的食材",
+    "no_dated_description": "不假定任何緊迫性。使用前請檢查標籤和狀態。",
+    "check_section_title": "檢查或移除",
+    "check_section_description": "這些食材已排除在拯救之外。開啟查看、確認、使用、丟棄或移除。",
+    "use_section_title": "優先使用",
+    "use_section_description": "按相關日期和明確的評估原因排序。",
+    "greeting_morning": "早晨",
+    "greeting_afternoon": "午安",
+    "greeting_evening": "晚安",
+    "badge_check_condition": "檢查狀態",
+    "badge_check_remove": "檢查 / 移除",
+    "badge_use_first": "優先使用",
+    "badge_use_soon": "盡快使用",
+    "badge_coming_up": "臨近",
+    "badge_no_urgency": "無緊迫性",
+    "view_item": "查看 {{name}}",
+    "rescue_item": "拯救 {{name}}"
+  },
+  "dates": {
+    "use_by_future": "保質期臨近。請遵循包裝說明。",
+    "use_by_today": "今日為保質期截止日。請遵循包裝說明。",
+    "use_by_passed": "已過保質期。請檢查或移除此食材，拯救功能不可用。",
+    "best_before_future_quality": "此日期為品質參考。",
+    "best_before_today_quality": "今日為最佳食用期，屬品質參考。",
+    "best_before_passed_check": "已過最佳食用期。請今日檢查並確認狀態。",
+    "best_before_passed_confirmed": "已過最佳食用期後今日已確認狀態。",
+    "opened_life_future": "開封後保質期內。",
+    "opened_life_last_day": "開封後保質期最後一天。",
+    "opened_life_passed": "已過開封後保質期。拯救功能不可用。",
+    "user_estimate_future": "您的預估日期臨近。",
+    "user_estimate_today": "您的預估日期是今天。",
+    "user_estimate_passed": "您的預估日期已過。請自行檢查。",
+    "unknown_date": "未記錄日期。請自行檢查包裝和狀態，不要假設緊迫性。"
+  },
+  "pantry": {
+    "eyebrow": "儲藏室 · Pantry",
+    "title": "所有食材",
+    "add_item": "添加食材",
+    "search_accessibility": "搜尋儲藏室",
+    "search_helper": "可搜尋英文名稱或繁體中文食材別名。",
+    "search_label": "搜尋",
+    "filter_status": "狀態",
+    "filter_category": "類別",
+    "filter_storage": "存放位置",
+    "loading": "載入儲藏室食材",
+    "error_description": "無法讀取本地儲藏室數據，未做任何更改。",
+    "error_retry": "重試儲藏室",
+    "error_title": "無法開啟儲藏室",
+    "empty_action": "添加第一個食材",
+    "empty_description": "手動錄入支援離線使用，無需掃描即可添加。",
+    "empty_title": "儲藏室已準備就緒",
+    "no_match_action": "清除篩選",
+    "no_match_description": "沒有食材匹配目前搜尋和篩選條件。",
+    "no_match_title": "無匹配食材",
+    "open_item": "開啟 {{name}} 詳情"
+  },
+  "rescue": {
+    "eyebrow": "拯救 · Rescue",
+    "title": "按需烹飪",
+    "title_loading": "正在尋找本地匹配",
+    "title_error": "拯救不可用",
+    "loading": "正在排序拯救食譜",
+    "error_description": "無法對本地儲藏室數據排序，未做任何更改。",
+    "error_retry": "重試拯救",
+    "error_title": "無法載入拯救",
+    "description": "本地食譜按日期指引、匹配食材、缺少食材和烹飪時間進行排序。",
+    "safety_title": "安全排除",
+    "safety_one": "{{count}} 個日期受限食材已從所有食譜中排除。",
+    "safety_other": "{{count}} 個日期受限食材已從所有食譜中排除。",
+    "condition_title": "請先檢查狀態",
+    "condition_description": "已過最佳食用期僅為品質指引。請在食材頁面確認狀態；確認將在香港時間午夜失效。",
+    "check_item": "請先檢查 {{name}}，之後拯救功能才可使用。",
+    "open_check": "開啟狀態檢查",
+    "empty_no_active_title": "暫無可用食材",
+    "empty_no_active_action": "添加食材",
+    "empty_no_active_description": "拯救僅對儲存在此裝置上的在用食材進行排序。",
+    "empty_no_match_title": "暫無本地食譜匹配",
+    "empty_no_match_action": "查看儲藏室",
+    "empty_no_match_description": "沒有食譜滿足最多缺少兩種非主食的匹配條件。請檢查狀態提示或添加食材。",
+    "ranked_title": "排序匹配"
+  },
+  "insights": {
+    "eyebrow": "洞察 · Insights",
+    "title": "觀察到的儲藏活動",
+    "title_loading": "正在載入活動記錄",
+    "title_error": "洞察不可用",
+    "loading": "載入洞察數據",
+    "error_description": "無法讀取記錄的活動數據，未做任何更改。",
+    "error_retry": "重試洞察",
+    "error_title": "無法載入洞察",
+    "description": "僅為記錄的行為。FreshLoop 不估算減少的浪費或將結果轉換為節省。",
+    "active_count": "目前在用",
+    "used_count": "已使用記錄",
+    "discarded_count": "已丟棄記錄",
+    "last_seven_days": "最近七天",
+    "no_outcomes": "暫無結果記錄。圖表會保持為零，直到您記錄操作。",
+    "return_today": "返回今日"
+  },
+  "settings": {
+    "eyebrow": "設定與關於",
+    "title": "FreshLoop",
+    "title_error": "無法載入設定",
+    "error_description": "無法讀取本地設定。",
+    "error_retry": "重試設定",
+    "error_title": "設定不可用",
+    "loading": "載入設定中",
+    "reminders_title": "儲藏室提醒",
+    "reminders_description": "可選本地提醒使用 FreshLoop 日期評估中的相關日期。",
+    "enable": "啟用提醒",
+    "disable": "禁用提醒",
+    "lead_3": "提前3天",
+    "lead_1": "提前1天",
+    "lead_0": "當天",
+    "on": "開",
+    "off": "關",
+    "update_error": "無法更新設定。現有本地數據未更改。",
+    "diagnostic_permission_denied": "通知權限已拒絕。應用仍可正常使用。",
+    "diagnostic_scheduled": "診斷通知已安排在15秒後。",
+    "language_title": "語言",
+    "language_en": "English",
+    "language_zh_cn": "简体中文",
+    "language_zh_tw": "繁體中文",
+    "about_title": "關於此應用",
+    "about_line1": "FreshLoop 是一款本地優先的儲藏室助手。它記錄觀察到的結果，絕不聲稱日期能保證食品安全。",
+    "about_line2": "Open Food Facts 數據基於 ODbL 1.0 許可提供。",
+    "about_meta": "您的儲藏室數據僅儲存在此裝置上。"
+  },
+  "onboarding": {
+    "eyebrow": "預設私隱保護",
+    "title": "歡迎使用 FreshLoop",
+    "privacy_title": "您的儲藏室僅在此裝置上",
+    "privacy_description": "無需登入、雲帳戶或網絡連接即可使用核心儲藏室功能。",
+    "dates_title": "日期指引檢查內容",
+    "dates_description": "保質期和最佳食用期含義不同。FreshLoop 解釋日期依據，但絕不宣稱食品安全。",
+    "error_title": "FreshLoop 無法完成設定",
+    "error_retry": "重試",
+    "import_demo": "匯入示範數據",
+    "start_empty": "從零開始"
+  },
+  "itemDetail": {
+    "eyebrow": "食材詳情 · Item detail",
+    "title_loading": "載入食材",
+    "loading": "載入食材詳情",
+    "title_missing": "食材未找到",
+    "missing_description": "該食材已不在本地儲存中。",
+    "missing_action": "返回儲藏室",
+    "error_title": "缺少食材",
+    "edit": "編輯",
+    "delete": "刪除",
+    "confirm_use": "標記已使用",
+    "confirm_discard": "標記已丟棄",
+    "undo": "撤銷",
+    "undo_time": "可撤銷",
+    "status": "狀態",
+    "quantity": "{{qty}} {{unit}}",
+    "date_basis": "日期依據",
+    "printed_date": "包裝日期",
+    "opened_on": "開封日期",
+    "storage": "存放位置",
+    "category": "類別",
+    "notes": "備註",
+    "barcode": "條碼",
+    "none": "無"
+  },
+  "addEdit": {
+    "add_title": "添加食材",
+    "edit_title": "編輯食材",
+    "name_label": "名稱",
+    "name_error": "請輸入食材名稱。",
+    "ingredient_label": "食材",
+    "ingredient_error": "請選擇已知食材或別名。",
+    "quantity_label": "數量",
+    "quantity_error": "請輸入正數。",
+    "unit_label": "單位",
+    "category_label": "類別",
+    "storage_label": "存放位置",
+    "date_basis_label": "日期依據",
+    "printed_date_label": "包裝日期",
+    "opened_on_label": "開封日期",
+    "opened_life_label": "開封後保質天數",
+    "notes_label": "備註",
+    "save": "儲存",
+    "save_error": "無法儲存食材。請檢查表單並重試。",
+    "scan": "掃描條碼"
+  },
+  "scanner": {
+    "title": "添加食材",
+    "scan_prompt": "掃描條碼",
+    "offline": "離線狀態下無法查詢產品資訊。請在下方手動輸入詳情。",
+    "permission_denied": "掃描條碼需要相機權限。請手動輸入詳情。",
+    "manual": "手動輸入"
+  },
+  "recipe": {
+    "detail_title": "食譜詳情",
+    "matched": "已有",
+    "missing": "缺少",
+    "staples": "主食",
+    "steps": "步驟",
+    "cooking_time": "{{minutes}} 分鐘",
+    "difficulty": "難度",
+    "disclaimer": "此食譜為本地建議。請在使用前檢查所有食材的過敏原和新鮮程度。"
+  },
+  "outcomes": {
+    "used": "已用",
+    "discarded": "已棄",
+    "confirm_used": "將此食材標記為已使用？",
+    "confirm_discarded": "將此食材標記為已丟棄？",
+    "undo_success": "結果已撤銷。",
+    "used_recorded": "已標記為使用",
+    "discarded_recorded": "已標記為丟棄",
+    "discard_reason": "丟棄原因（選填）"
+  }
+}

From 9127e7a85b93e8e384f4eb3f28da858702d6a89d Mon Sep 17 00:00:00 2001
From: mmy0302 <mengyu_miao@connect.hku.hk>
Date: Thu, 23 Jul 2026 23:57:36 +0800
Subject: [PATCH 2/3] =?UTF-8?q?chore:=20=E7=A7=BB=E9=99=A4=E6=9C=AA?=
 =?UTF-8?q?=E4=BD=BF=E7=94=A8=E7=9A=84=E5=AF=BC=E5=85=A5=E5=B9=B6=E4=BF=AE?=
 =?UTF-8?q?=E5=A4=8D=20lint=20=E6=B3=A8=E9=87=8A?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 mobile/src/features/settings/SettingsScreen.tsx        | 1 -
 mobile/src/features/settings/__tests__/screen.test.tsx | 1 -
 mobile/src/i18n/index.ts                               | 2 ++
 3 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/mobile/src/features/settings/SettingsScreen.tsx b/mobile/src/features/settings/SettingsScreen.tsx
index 2d8d2dd..442ff9e 100644
--- a/mobile/src/features/settings/SettingsScreen.tsx
+++ b/mobile/src/features/settings/SettingsScreen.tsx
@@ -2,7 +2,6 @@ import { useRouter } from 'expo-router';
 import { useCallback, useEffect, useState, type ComponentType } from 'react';
 import { useTranslation } from 'react-i18next';
 
-import type { NotificationLeadDays } from '@/data/repositories';
 import { ResetDemoDataCard } from '@/features/onboarding';
 import { getFreshLoopDatabase } from '@/data/database/expo-sqlite';
 import { SettingsRepository } from '@/data/repositories/settings';
diff --git a/mobile/src/features/settings/__tests__/screen.test.tsx b/mobile/src/features/settings/__tests__/screen.test.tsx
index 73ee9df..c3a6f6d 100644
--- a/mobile/src/features/settings/__tests__/screen.test.tsx
+++ b/mobile/src/features/settings/__tests__/screen.test.tsx
@@ -12,7 +12,6 @@ jest.mock('react-i18next', () => {
   return {
     useTranslation: () => {
       if (i18n === undefined) {
-        // eslint-disable-next-line @typescript-eslint/no-require-imports
         i18n = jest.requireActual('i18next');
       }
       return {
diff --git a/mobile/src/i18n/index.ts b/mobile/src/i18n/index.ts
index 5a29d49..3b9e85f 100644
--- a/mobile/src/i18n/index.ts
+++ b/mobile/src/i18n/index.ts
@@ -55,6 +55,7 @@ export async function initI18n(store?: LanguageStore): Promise<SupportedLanguage
     language = deviceLanguage();
   }
 
+  // eslint-disable-next-line import/no-named-as-default-member
   void i18next.use(initReactI18next).init({
     compatibilityJSON: 'v4',
     resources,
@@ -72,6 +73,7 @@ export async function changeLanguage(
   language: SupportedLanguage,
   store?: LanguageWriter,
 ): Promise<void> {
+  // eslint-disable-next-line import/no-named-as-default-member
   await i18next.changeLanguage(language);
   if (store !== undefined) {
     await store.set(LANGUAGE_KEY, language);

From e1383857d9490f845b675c7a44565a89ff7cf0d2 Mon Sep 17 00:00:00 2001
From: mmy0302 <mengyu_miao@connect.hku.hk>
Date: Fri, 24 Jul 2026 00:02:21 +0800
Subject: [PATCH 3/3] =?UTF-8?q?fix(rescue):=20=E6=9B=B4=E6=96=B0=E6=97=A0?=
 =?UTF-8?q?=E9=9A=9C=E7=A2=8D=E6=A0=87=E7=AD=BE=E6=B5=8B=E8=AF=95=E7=94=A8?=
 =?UTF-8?q?=E4=BE=8B?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 mobile/src/features/rescue/__tests__/screens.test.tsx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mobile/src/features/rescue/__tests__/screens.test.tsx b/mobile/src/features/rescue/__tests__/screens.test.tsx
index d646d7a..6886b08 100644
--- a/mobile/src/features/rescue/__tests__/screens.test.tsx
+++ b/mobile/src/features/rescue/__tests__/screens.test.tsx
@@ -73,7 +73,7 @@ describe('Rescue screens', () => {
     expect(screen.root.findByProps({ children: 'Check Greek yogurt before Rescue can use it.' })).toBeTruthy();
     expect(screen.root.findAllByProps({ children: 'Chicken fillets' })).toHaveLength(0);
 
-    act(() => screen.root.findByProps({ accessibilityLabel: 'Check condition for Greek yogurt' }).props.onPress());
+    act(() => screen.root.findByProps({ accessibilityLabel: 'Open condition check Greek yogurt' }).props.onPress());
     expect(mockRouter.push).toHaveBeenCalledWith('/item/demo-04-best-before-past');
     act(() => screen.unmount());
   });