Use American English in the core class references

Prose only — code identifiers such as color-field are unchanged.

Author: ajaydsouza

docs/02-wzsa-core-classes/field-types-reference.md

@@ -25,7 +25,7 @@ An unrecognised `type` falls through to `callback_missing()`, which prints a not
 | `password` | Password input | Sanitized with `sanitize_text_field()`. Use `sensitive` for API keys. |
 | `sensitive` | Password-style input | Value is encrypted at rest and masked in the UI, showing only the last four characters. |
 | `number` | Number input | Uses `min`, `max`, and `step`. |
-| `color` | Colour picker | Adds the `color-field` class and enqueues `wp-color-picker`. |
+| `color` | Color picker | Adds the `color-field` class and enqueues `wp-color-picker`. |
 | `file` | Input plus a **Choose File** button | Opens the media uploader. Override the button label with `'options' => array( 'button_label' => … )`. Sanitized with `esc_url_raw()`. |
 
 ## Multi-line
@@ -94,7 +94,7 @@ An unrecognised `type` falls through to `callback_missing()`, which prints a not
 
 Each row carries a hidden `row_id` so rows stay identifiable across saves and reordering. Sub-field HTML can be filtered with `{$prefix}_repeater_field_{$type}`.
 
-## Shared behaviour
+## Shared behavior
 
 - `field_class` adds CSS classes; each class is passed through `sanitize_html_class()`.
 - `field_attributes` renders arbitrary HTML attributes as `attribute => value`.

docs/02-wzsa-core-classes/sanitization-reference.md

@@ -26,7 +26,7 @@ Every callback receives the field configuration as its second argument, which is
 
 ## Callbacks by type
 
-| Method | Applies to | Behaviour |
+| Method | Applies to | Behavior |
 |---|---|---|
 | `sanitize_text_field()` | `text`, and most text-like types | Delegates to `sanitize_textarea_field()`. |
 | `sanitize_textarea_field()` | `textarea`, `css`, `html`, `wysiwyg` | `wp_kses()` against `$allowedposttags` extended with `script`, `style`, and `link` tags, filterable via `{$prefix}_sanitize_allowed_tags`. |
@@ -60,7 +60,7 @@ Every callback receives the field configuration as its second argument, which is
 
 ## Helper
 
-`sanitize_tax_slugs( &$settings, $source_key, $target_key )` is a static helper for taxonomy pickers. It parses values in the `Name (taxonomy:term_taxonomy_id)` format, resolves each to a real term, and writes the term taxonomy IDs into `$target_key` while normalising the display slugs in `$source_key`. Plain category names are still accepted for backwards compatibility.
+`sanitize_tax_slugs( &$settings, $source_key, $target_key )` is a static helper for taxonomy pickers. It parses values in the `Name (taxonomy:term_taxonomy_id)` format, resolves each to a real term, and writes the term taxonomy IDs into `$target_key` while normalizing the display slugs in `$source_key`. Plain category names are still accepted for backwards compatibility.
 
 ## Overriding a sanitizer
 

docs/02-wzsa-core-classes/the-defaults-contract.md

@@ -17,7 +17,7 @@ Four rules govern the array. Breaking any of them produces a defect that phpcs,
 
 Nothing in the array may translate, and nothing it calls may translate transitively. Avoiding the translation stack is the entire reason the array exists.
 
-## 2. Values are pre-normalised
+## 2. Values are pre-normalized
 
 Each value must already match what `settings_defaults()` emits **after** its casts. Checkbox defaults are `1` and `0`, never `true` and `false`. A `false` where the saved default is `0` breaks block attributes and REST schemas typed as `number`.
 
@@ -37,13 +37,13 @@ A default that must be translated or computed at runtime cannot live in the arra
 $title = my_plugin_get_option( 'toc_title', __( 'Table of Contents', 'my-plugin' ) );
 ```
 
-## Initialise `$prefix` at declaration
+## Initialize `$prefix` at declaration
 
 ```php
 public static $prefix = 'my_plugin';
 ```
 
-`Settings::$prefix` must be initialised where it is declared, not only in the constructor. The static methods are reachable on the frontend, where the `Settings` object is never instantiated, and a null prefix there fires `_settings_defaults` instead of `{$prefix}_settings_defaults`.
+`Settings::$prefix` must be initialized where it is declared, not only in the constructor. The static methods are reachable on the frontend, where the `Settings` object is never instantiated, and a null prefix there fires `_settings_defaults` instead of `{$prefix}_settings_defaults`.
 
 ## Verifying the invariant