From e23d4f27d7fb133aea84c8f3cfdc7be24ef5aade Mon Sep 17 00:00:00 2001
From: Manzoor Wani <manzoorwani.jk@gmail.com>
Date: Fri, 10 Apr 2026 07:06:34 +0530
Subject: [PATCH 01/11] I18N: Add translation support for script modules.
MIME-Version: 1.0
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Content-Transfer-Encoding: 8bit

Add `wp_set_script_module_translations()` and supporting infrastructure
to enable i18n for script modules (ES modules), mirroring the existing
`wp_set_script_translations()` for classic scripts.

Script modules registered via `wp_register_script_module()` currently
have no way to load translation data, leaving strings untranslated on
pages like Connectors and Fonts that are built as script modules.

New public API:
- `wp_set_script_module_translations()` in script-modules.php
- `load_script_module_textdomain()` in l10n.php

New methods on `WP_Script_Modules`:
- `set_translations()` — stores text domain per module
- `get_registered_src()` — public accessor for module source URL
- `print_script_module_translations()` — outputs inline setLocaleData()
  calls after classic scripts load but before modules execute

See #65015.
---
 src/wp-includes/class-wp-script-modules.php   | 111 +++++++++++++-
 src/wp-includes/l10n.php                      | 145 ++++++++++++++++++
 src/wp-includes/script-modules.php            |  24 +++
 .../tests/script-modules/wpScriptModules.php  | 111 ++++++++++++++
 4 files changed, 390 insertions(+), 1 deletion(-)

diff --git a/src/wp-includes/class-wp-script-modules.php b/src/wp-includes/class-wp-script-modules.php
index 058e5f0eef0e6..e9c7af94a46bb 100644
--- a/src/wp-includes/class-wp-script-modules.php
+++ b/src/wp-includes/class-wp-script-modules.php
@@ -81,6 +81,17 @@ class WP_Script_Modules {
 	 */
 	private $modules_with_missing_dependencies = array();
 
+	/**
+	 * Holds translation data for script modules, keyed by script module identifier.
+	 *
+	 * Each entry contains 'domain' and 'path' keys for the text domain
+	 * and the path to translation files respectively.
+	 *
+	 * @since x.y.z
+	 * @var array<string, array{domain: string, path: string}>
+	 */
+	private $translations = array();
+
 	/**
 	 * Registers the script module if no script module with that script module
 	 * identifier has already been registered.
@@ -328,6 +339,74 @@ public function deregister( string $id ) {
 		unset( $this->registered[ $id ] );
 	}
 
+	/**
+	 * Sets translated strings for a script module.
+	 *
+	 * Works similar to {@see WP_Scripts::set_translations()} but for script modules.
+	 * The translations will be loaded and output as inline scripts before
+	 * the script modules are printed, calling `wp.i18n.setLocaleData()`.
+	 *
+	 * @since x.y.z
+	 *
+	 * @param string $id     The identifier of the script module.
+	 * @param string $domain Optional. Text domain. Default 'default'.
+	 * @param string $path   Optional. The full file path to the directory containing translation files.
+	 * @return bool True if the text domain was registered, false if the module is not registered.
+	 */
+	public function set_translations( string $id, string $domain = 'default', string $path = '' ): bool {
+		if ( ! isset( $this->registered[ $id ] ) ) {
+			return false;
+		}
+
+		$this->translations[ $id ] = array(
+			'domain' => $domain,
+			'path'   => $path,
+		);
+
+		return true;
+	}
+
+	/**
+	 * Prints translations for all enqueued script modules that have translations set.
+	 *
+	 * Outputs inline `<script>` tags that call `wp.i18n.setLocaleData()` with
+	 * the translated strings for each script module. This must run before
+	 * the script modules execute.
+	 *
+	 * @since x.y.z
+	 */
+	public function print_script_module_translations(): void {
+		// Collect all module IDs that will be on the page (enqueued + their dependencies).
+		$module_ids = $this->get_sorted_dependencies( $this->queue );
+
+		foreach ( $module_ids as $id ) {
+			if ( ! isset( $this->translations[ $id ] ) ) {
+				continue;
+			}
+
+			$domain = $this->translations[ $id ]['domain'];
+			$path   = $this->translations[ $id ]['path'];
+
+			$json_translations = load_script_module_textdomain( $id, $domain, $path );
+
+			if ( ! $json_translations ) {
+				continue;
+			}
+
+			$output = <<<JS
+( function( domain, translations ) {
+	var localeData = translations.locale_data[ domain ] || translations.locale_data.messages;
+	localeData[""].domain = domain;
+	wp.i18n.setLocaleData( localeData, domain );
+} )( "{$domain}", {$json_translations} );
+JS;
+
+			$source_url = rawurlencode( "{$id}-js-module-translations" );
+			$output    .= "\n//# sourceURL={$source_url}";
+			wp_print_inline_script_tag( $output, array( 'id' => "{$id}-js-module-translations" ) );
+		}
+	}
+
 	/**
 	 * Adds the hooks to print the import map, enqueued script modules and script
 	 * module preloads.
@@ -352,13 +431,23 @@ public function add_hooks() {
 			 */
 			add_action( 'wp_head', array( $this, 'print_head_enqueued_script_modules' ) );
 		}
-		add_action( 'wp_footer', array( $this, 'print_enqueued_script_modules' ) );
 		add_action( $position, array( $this, 'print_script_module_preloads' ) );
 
 		add_action( 'admin_print_footer_scripts', array( $this, 'print_import_map' ), 9 );
+
+		add_action( 'wp_footer', array( $this, 'print_enqueued_script_modules' ) );
 		add_action( 'admin_print_footer_scripts', array( $this, 'print_enqueued_script_modules' ) );
 		add_action( 'admin_print_footer_scripts', array( $this, 'print_script_module_preloads' ) );
 
+		/*
+		 * Print translations after classic scripts like wp-i18n are loaded (at
+		 * priority 10 via _wp_footer_scripts), but before the script modules
+		 * execute. Script modules with type="module" are deferred by default,
+		 * so inline translation scripts at priority 11 will execute before them.
+		 */
+		add_action( 'wp_footer', array( $this, 'print_script_module_translations' ), 21 );
+		add_action( 'admin_print_footer_scripts', array( $this, 'print_script_module_translations' ), 11 );
+
 		add_action( 'wp_footer', array( $this, 'print_script_module_data' ) );
 		add_action( 'admin_print_footer_scripts', array( $this, 'print_script_module_data' ) );
 		add_action( 'wp_footer', array( $this, 'print_a11y_script_module_html' ), 20 );
@@ -840,6 +929,26 @@ private function sort_item_dependencies( string $id, array $import_types, array
 		return true;
 	}
 
+	/**
+	 * Gets the raw source URL for a registered script module.
+	 *
+	 * Returns the source URL without version query string appended.
+	 * This is used by {@see load_script_module_textdomain()} to determine
+	 * the relative path for loading translation files.
+	 *
+	 * @since x.y.z
+	 *
+	 * @param string $id The script module identifier.
+	 * @return string|false The script module source URL, or false if not registered.
+	 */
+	public function get_registered_src( string $id ) {
+		if ( ! isset( $this->registered[ $id ] ) ) {
+			return false;
+		}
+
+		return $this->registered[ $id ]['src'];
+	}
+
 	/**
 	 * Gets the versioned URL for a script module src.
 	 *
diff --git a/src/wp-includes/l10n.php b/src/wp-includes/l10n.php
index cd6eeaed5e0b6..8b0ee8eaa6b30 100644
--- a/src/wp-includes/l10n.php
+++ b/src/wp-includes/l10n.php
@@ -1280,6 +1280,151 @@ function load_script_textdomain( $handle, $domain = 'default', $path = '' ) {
 	return load_script_translations( false, $handle, $domain );
 }
 
+/**
+ * Loads the translation data for a given script module ID and text domain.
+ *
+ * Works like {@see load_script_textdomain()} but for script modules registered
+ * via {@see wp_register_script_module()}.
+ *
+ * @since x.y.z
+ *
+ * @param string $id     The script module identifier.
+ * @param string $domain Optional. Text domain. Default 'default'.
+ * @param string $path   Optional. The full file path to the directory containing translation files.
+ * @return string|false The JSON-encoded translated strings for the given script module and text domain.
+ *                      False if there are none.
+ */
+function load_script_module_textdomain( $id, $domain = 'default', $path = '' ) {
+	/** @var WP_Textdomain_Registry $wp_textdomain_registry */
+	global $wp_textdomain_registry;
+
+	$src = wp_script_modules()->get_registered_src( $id );
+
+	if ( false === $src ) {
+		return false;
+	}
+
+	$locale = determine_locale();
+
+	if ( ! $path ) {
+		$path = $wp_textdomain_registry->get( $domain, $locale );
+	}
+
+	$path = untrailingslashit( $path );
+
+	// If a path was given and the handle file exists simply return it.
+	$file_base       = 'default' === $domain ? $locale : $domain . '-' . $locale;
+	$handle_filename = $file_base . '-' . $id . '.json';
+
+	if ( $path ) {
+		$translations = load_script_translations( $path . '/' . $handle_filename, $id, $domain );
+
+		if ( $translations ) {
+			return $translations;
+		}
+	}
+
+	// Ensure src is an absolute URL for path resolution.
+	if ( ! preg_match( '|^(https?:)?//|', $src ) ) {
+		$src = site_url( $src );
+	}
+
+	$relative       = false;
+	$languages_path = WP_LANG_DIR;
+
+	$src_url     = wp_parse_url( $src );
+	$content_url = wp_parse_url( content_url() );
+	$plugins_url = wp_parse_url( plugins_url() );
+	$site_url    = wp_parse_url( site_url() );
+	$theme_root  = get_theme_root();
+
+	// If the host is the same or it's a relative URL.
+	if (
+		( ! isset( $content_url['path'] ) || str_starts_with( $src_url['path'], $content_url['path'] ) ) &&
+		( ! isset( $src_url['host'] ) || ! isset( $content_url['host'] ) || $src_url['host'] === $content_url['host'] )
+	) {
+		// Make the src relative the specific plugin or theme.
+		if ( isset( $content_url['path'] ) ) {
+			$relative = substr( $src_url['path'], strlen( $content_url['path'] ) );
+		} else {
+			$relative = $src_url['path'];
+		}
+		$relative = trim( $relative, '/' );
+		$relative = explode( '/', $relative );
+
+		$theme_dir = array_slice( explode( '/', $theme_root ), -1 );
+		$dirname   = $theme_dir[0] === $relative[0] ? 'themes' : 'plugins';
+
+		$languages_path = WP_LANG_DIR . '/' . $dirname;
+
+		$relative = array_slice( $relative, 2 ); // Remove plugins/<plugin name> or themes/<theme name>.
+		$relative = implode( '/', $relative );
+	} elseif (
+		( ! isset( $plugins_url['path'] ) || str_starts_with( $src_url['path'], $plugins_url['path'] ) ) &&
+		( ! isset( $src_url['host'] ) || ! isset( $plugins_url['host'] ) || $src_url['host'] === $plugins_url['host'] )
+	) {
+		// Make the src relative the specific plugin.
+		if ( isset( $plugins_url['path'] ) ) {
+			$relative = substr( $src_url['path'], strlen( $plugins_url['path'] ) );
+		} else {
+			$relative = $src_url['path'];
+		}
+		$relative = trim( $relative, '/' );
+		$relative = explode( '/', $relative );
+
+		$languages_path = WP_LANG_DIR . '/plugins';
+
+		$relative = array_slice( $relative, 1 ); // Remove <plugin name>.
+		$relative = implode( '/', $relative );
+	} elseif ( ! isset( $src_url['host'] ) || ! isset( $site_url['host'] ) || $src_url['host'] === $site_url['host'] ) {
+		if ( ! isset( $site_url['path'] ) ) {
+			$relative = trim( $src_url['path'], '/' );
+		} elseif ( str_starts_with( $src_url['path'], trailingslashit( $site_url['path'] ) ) ) {
+			// Make the src relative to the WP root.
+			$relative = substr( $src_url['path'], strlen( $site_url['path'] ) );
+			$relative = trim( $relative, '/' );
+		}
+	}
+
+	/**
+	 * Filters the relative path of script module source used for finding translation files.
+	 *
+	 * @since x.y.z
+	 *
+	 * @param string|false $relative The relative path of the script module source. False if it could not be determined.
+	 * @param string       $src      The full source URL of the script module.
+	 */
+	$relative = apply_filters( 'load_script_module_textdomain_relative_path', $relative, $src );
+
+	// If the source is not from WP.
+	if ( false === $relative ) {
+		return load_script_translations( false, $id, $domain );
+	}
+
+	// Translations are always based on the unminified filename.
+	if ( str_ends_with( $relative, '.min.js' ) ) {
+		$relative = substr( $relative, 0, -7 ) . '.js';
+	}
+
+	$md5_filename = $file_base . '-' . md5( $relative ) . '.json';
+
+	if ( $path ) {
+		$translations = load_script_translations( $path . '/' . $md5_filename, $id, $domain );
+
+		if ( $translations ) {
+			return $translations;
+		}
+	}
+
+	$translations = load_script_translations( $languages_path . '/' . $md5_filename, $id, $domain );
+
+	if ( $translations ) {
+		return $translations;
+	}
+
+	return load_script_translations( false, $id, $domain );
+}
+
 /**
  * Loads the translation data for the given script handle and text domain.
  *
diff --git a/src/wp-includes/script-modules.php b/src/wp-includes/script-modules.php
index 3e5c39bff18d5..04649358146b0 100644
--- a/src/wp-includes/script-modules.php
+++ b/src/wp-includes/script-modules.php
@@ -138,6 +138,25 @@ function wp_deregister_script_module( string $id ) {
 	wp_script_modules()->deregister( $id );
 }
 
+/**
+ * Sets translated strings for a script module.
+ *
+ * Works similar to {@see wp_set_script_translations()} but for script modules
+ * registered via {@see wp_register_script_module()}.
+ *
+ * @since x.y.z
+ *
+ * @see WP_Script_Modules::set_translations()
+ *
+ * @param string $id     The identifier of the script module.
+ * @param string $domain Optional. Text domain. Default 'default'.
+ * @param string $path   Optional. The full file path to the directory containing translation files.
+ * @return bool True if the text domain was successfully localized, false otherwise.
+ */
+function wp_set_script_module_translations( string $id, string $domain = 'default', string $path = '' ): bool {
+	return wp_script_modules()->set_translations( $id, $domain, $path );
+}
+
 /**
  * Registers all the default WordPress Script Modules.
  *
@@ -197,6 +216,11 @@ function wp_default_script_modules() {
 		$path        = includes_url( "js/dist/script-modules/{$file_name}" );
 		$module_deps = $script_module_data['module_dependencies'] ?? array();
 		wp_register_script_module( $script_module_id, $path, $module_deps, $script_module_data['version'], $args );
+
+		// Set up translations for script modules that use wp-i18n.
+		if ( isset( $script_module_data['dependencies'] ) && in_array( 'wp-i18n', $script_module_data['dependencies'], true ) ) {
+			wp_set_script_module_translations( $script_module_id, 'default' );
+		}
 	}
 
 	wp_register_script_module(
diff --git a/tests/phpunit/tests/script-modules/wpScriptModules.php b/tests/phpunit/tests/script-modules/wpScriptModules.php
index 4f647c6a3d2e0..dd2c8f6bdcea1 100644
--- a/tests/phpunit/tests/script-modules/wpScriptModules.php
+++ b/tests/phpunit/tests/script-modules/wpScriptModules.php
@@ -2566,4 +2566,115 @@ public function test_missing_script_module_dependency_triggers_incorrect_usage()
 			$this->caught_doing_it_wrong[ $expected_incorrect_usage ]
 		);
 	}
+
+	/**
+	 * Tests that set_translations() returns false for unregistered module.
+	 *
+	 * @ticket 65015
+	 *
+	 * @covers WP_Script_Modules::set_translations
+	 */
+	public function test_set_translations_returns_false_for_unregistered_module() {
+		$result = $this->script_modules->set_translations( 'unregistered-module', 'default' );
+		$this->assertFalse( $result );
+	}
+
+	/**
+	 * Tests that set_translations() returns true for registered module.
+	 *
+	 * @ticket 65015
+	 *
+	 * @covers WP_Script_Modules::set_translations
+	 */
+	public function test_set_translations_returns_true_for_registered_module() {
+		$this->script_modules->register( 'test-module', '/test-module.js' );
+		$result = $this->script_modules->set_translations( 'test-module', 'test-domain' );
+		$this->assertTrue( $result );
+	}
+
+	/**
+	 * Tests that wp_set_script_module_translations() wrapper works.
+	 *
+	 * @ticket 65015
+	 *
+	 * @covers ::wp_set_script_module_translations
+	 */
+	public function test_wp_set_script_module_translations_wrapper() {
+		wp_register_script_module( 'test-module', '/test-module.js' );
+		$result = wp_set_script_module_translations( 'test-module', 'test-domain' );
+		$this->assertTrue( $result );
+	}
+
+	/**
+	 * Tests that wp_set_script_module_translations() returns false for unregistered module.
+	 *
+	 * @ticket 65015
+	 *
+	 * @covers ::wp_set_script_module_translations
+	 */
+	public function test_wp_set_script_module_translations_returns_false_for_unregistered() {
+		$result = wp_set_script_module_translations( 'unregistered-module', 'default' );
+		$this->assertFalse( $result );
+	}
+
+	/**
+	 * Tests that get_registered_src() returns false for unregistered module.
+	 *
+	 * @ticket 65015
+	 *
+	 * @covers WP_Script_Modules::get_registered_src
+	 */
+	public function test_get_registered_src_returns_false_for_unregistered_module() {
+		$result = $this->script_modules->get_registered_src( 'unregistered-module' );
+		$this->assertFalse( $result );
+	}
+
+	/**
+	 * Tests that get_registered_src() returns correct src for registered module.
+	 *
+	 * @ticket 65015
+	 *
+	 * @covers WP_Script_Modules::get_registered_src
+	 */
+	public function test_get_registered_src_returns_src_for_registered_module() {
+		$this->script_modules->register( 'test-module', '/test-module.js' );
+		$result = $this->script_modules->get_registered_src( 'test-module' );
+		$this->assertSame( '/test-module.js', $result );
+	}
+
+	/**
+	 * Tests that print_script_module_translations() outputs nothing when no translations are set.
+	 *
+	 * @ticket 65015
+	 *
+	 * @covers WP_Script_Modules::print_script_module_translations
+	 */
+	public function test_print_script_module_translations_outputs_nothing_when_no_translations() {
+		$this->script_modules->register( 'test-module', '/test-module.js' );
+		$this->script_modules->enqueue( 'test-module' );
+
+		ob_start();
+		$this->script_modules->print_script_module_translations();
+		$output = ob_get_clean();
+
+		$this->assertEmpty( $output );
+	}
+
+	/**
+	 * Tests that print_script_module_translations() outputs nothing for non-enqueued modules.
+	 *
+	 * @ticket 65015
+	 *
+	 * @covers WP_Script_Modules::print_script_module_translations
+	 */
+	public function test_print_script_module_translations_outputs_nothing_for_non_enqueued() {
+		$this->script_modules->register( 'test-module', '/test-module.js' );
+		$this->script_modules->set_translations( 'test-module', 'default' );
+
+		ob_start();
+		$this->script_modules->print_script_module_translations();
+		$output = ob_get_clean();
+
+		$this->assertEmpty( $output );
+	}
 }

From 7057417858a8d2a857c29fbd1d48150a468ab971 Mon Sep 17 00:00:00 2001
From: Manzoor Wani <manzoorwani.jk@gmail.com>
Date: Fri, 10 Apr 2026 18:33:10 +0530
Subject: [PATCH 02/11] Tests: Add end-to-end coverage for script module
 translation printing.

Add two integration tests verifying the full translation flow:

- test_print_script_module_translations_outputs_set_locale_data covers
  the happy path, asserting that the inline script contains the
  expected module ID, the wp.i18n.setLocaleData() call, and the
  translated string.
- test_print_script_module_translations_includes_dependencies covers
  translations for dependency modules (not just directly enqueued ones).

Both tests use the pre_load_script_translations filter to provide
mock translation data inline, so no fixture JSON files are needed.

See #65015.
---
 .../tests/script-modules/wpScriptModules.php  | 96 +++++++++++++++++++
 1 file changed, 96 insertions(+)

diff --git a/tests/phpunit/tests/script-modules/wpScriptModules.php b/tests/phpunit/tests/script-modules/wpScriptModules.php
index dd2c8f6bdcea1..9f5103d4d2ecd 100644
--- a/tests/phpunit/tests/script-modules/wpScriptModules.php
+++ b/tests/phpunit/tests/script-modules/wpScriptModules.php
@@ -2677,4 +2677,100 @@ public function test_print_script_module_translations_outputs_nothing_for_non_en
 
 		$this->assertEmpty( $output );
 	}
+
+	/**
+	 * Tests that print_script_module_translations() outputs an inline script
+	 * calling wp.i18n.setLocaleData() when translations are available.
+	 *
+	 * @ticket 65015
+	 *
+	 * @covers WP_Script_Modules::print_script_module_translations
+	 * @covers ::load_script_module_textdomain
+	 */
+	public function test_print_script_module_translations_outputs_set_locale_data() {
+		$this->script_modules->register( 'test-module', '/wp-includes/js/test-module.js' );
+		$this->script_modules->enqueue( 'test-module' );
+		$this->script_modules->set_translations( 'test-module', 'default' );
+
+		// Provide test translations via the pre_load_script_translations filter
+		// so no fixture files are needed.
+		add_filter(
+			'pre_load_script_translations',
+			static function ( $translations, $file, $handle ) {
+				if ( 'test-module' !== $handle ) {
+					return $translations;
+				}
+				return wp_json_encode(
+					array(
+						'domain'      => 'messages',
+						'locale_data' => array(
+							'messages' => array(
+								''      => array(
+									'domain' => 'messages',
+									'lang'   => 'es',
+								),
+								'Hello' => array( 'Hola' ),
+							),
+						),
+					)
+				);
+			},
+			10,
+			3
+		);
+
+		ob_start();
+		$this->script_modules->print_script_module_translations();
+		$output = ob_get_clean();
+
+		$this->assertStringContainsString( 'test-module-js-module-translations', $output, 'Translation inline script should be printed with the expected ID.' );
+		$this->assertStringContainsString( 'wp.i18n.setLocaleData', $output, 'Output should call wp.i18n.setLocaleData().' );
+		$this->assertStringContainsString( 'Hola', $output, 'Output should contain the translated string.' );
+	}
+
+	/**
+	 * Tests that print_script_module_translations() also outputs translations
+	 * for dependencies of enqueued modules (not just directly enqueued ones).
+	 *
+	 * @ticket 65015
+	 *
+	 * @covers WP_Script_Modules::print_script_module_translations
+	 */
+	public function test_print_script_module_translations_includes_dependencies() {
+		$this->script_modules->register( 'dep-module', '/wp-includes/js/dep-module.js' );
+		$this->script_modules->register( 'main-module', '/wp-includes/js/main-module.js', array( 'dep-module' ) );
+		$this->script_modules->enqueue( 'main-module' );
+		$this->script_modules->set_translations( 'dep-module', 'default' );
+
+		add_filter(
+			'pre_load_script_translations',
+			static function ( $translations, $file, $handle ) {
+				if ( 'dep-module' !== $handle ) {
+					return $translations;
+				}
+				return wp_json_encode(
+					array(
+						'locale_data' => array(
+							'messages' => array(
+								''      => array(
+									'domain' => 'messages',
+									'lang'   => 'es',
+								),
+								'World' => array( 'Mundo' ),
+							),
+						),
+					)
+				);
+			},
+			10,
+			3
+		);
+
+		ob_start();
+		$this->script_modules->print_script_module_translations();
+		$output = ob_get_clean();
+
+		$this->assertStringContainsString( 'dep-module-js-module-translations', $output, 'Dependency module translations should be printed.' );
+		$this->assertStringContainsString( 'Mundo', $output, 'Output should contain the dependency translation.' );
+	}
 }

From 40bbbf25e798bd61994f23b4ab12f9cb77f7c9b8 Mon Sep 17 00:00:00 2001
From: Manzoor Wani <manzoorwani.jk@gmail.com>
Date: Sat, 11 Apr 2026 18:06:21 +0530
Subject: [PATCH 03/11] Script Loader: Restore original position of
 print_enqueued_script_modules hook.

This hook registration was accidentally moved during iteration on the
translation hook timing. Restore it to its original position to keep
the diff minimal.

See #65015.
---
 src/wp-includes/class-wp-script-modules.php | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/wp-includes/class-wp-script-modules.php b/src/wp-includes/class-wp-script-modules.php
index e9c7af94a46bb..9f7c0d2eb7f67 100644
--- a/src/wp-includes/class-wp-script-modules.php
+++ b/src/wp-includes/class-wp-script-modules.php
@@ -431,11 +431,10 @@ public function add_hooks() {
 			 */
 			add_action( 'wp_head', array( $this, 'print_head_enqueued_script_modules' ) );
 		}
+		add_action( 'wp_footer', array( $this, 'print_enqueued_script_modules' ) );
 		add_action( $position, array( $this, 'print_script_module_preloads' ) );
 
 		add_action( 'admin_print_footer_scripts', array( $this, 'print_import_map' ), 9 );
-
-		add_action( 'wp_footer', array( $this, 'print_enqueued_script_modules' ) );
 		add_action( 'admin_print_footer_scripts', array( $this, 'print_enqueued_script_modules' ) );
 		add_action( 'admin_print_footer_scripts', array( $this, 'print_script_module_preloads' ) );
 

From e23c08a8f5da8ba557f9a1e2b6dabd480d02fcb9 Mon Sep 17 00:00:00 2001
From: Manzoor Wani <manzoorwani.jk@gmail.com>
Date: Sat, 11 Apr 2026 18:07:46 +0530
Subject: [PATCH 04/11] Docs: Update `@since` tags to 7.0.0 for script module
 translation APIs.

See #65015.
---
 src/wp-includes/class-wp-script-modules.php | 8 ++++----
 src/wp-includes/l10n.php                    | 4 ++--
 src/wp-includes/script-modules.php          | 2 +-
 3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/src/wp-includes/class-wp-script-modules.php b/src/wp-includes/class-wp-script-modules.php
index 9f7c0d2eb7f67..1ad593b32b545 100644
--- a/src/wp-includes/class-wp-script-modules.php
+++ b/src/wp-includes/class-wp-script-modules.php
@@ -87,7 +87,7 @@ class WP_Script_Modules {
 	 * Each entry contains 'domain' and 'path' keys for the text domain
 	 * and the path to translation files respectively.
 	 *
-	 * @since x.y.z
+	 * @since 7.0.0
 	 * @var array<string, array{domain: string, path: string}>
 	 */
 	private $translations = array();
@@ -346,7 +346,7 @@ public function deregister( string $id ) {
 	 * The translations will be loaded and output as inline scripts before
 	 * the script modules are printed, calling `wp.i18n.setLocaleData()`.
 	 *
-	 * @since x.y.z
+	 * @since 7.0.0
 	 *
 	 * @param string $id     The identifier of the script module.
 	 * @param string $domain Optional. Text domain. Default 'default'.
@@ -373,7 +373,7 @@ public function set_translations( string $id, string $domain = 'default', string
 	 * the translated strings for each script module. This must run before
 	 * the script modules execute.
 	 *
-	 * @since x.y.z
+	 * @since 7.0.0
 	 */
 	public function print_script_module_translations(): void {
 		// Collect all module IDs that will be on the page (enqueued + their dependencies).
@@ -935,7 +935,7 @@ private function sort_item_dependencies( string $id, array $import_types, array
 	 * This is used by {@see load_script_module_textdomain()} to determine
 	 * the relative path for loading translation files.
 	 *
-	 * @since x.y.z
+	 * @since 7.0.0
 	 *
 	 * @param string $id The script module identifier.
 	 * @return string|false The script module source URL, or false if not registered.
diff --git a/src/wp-includes/l10n.php b/src/wp-includes/l10n.php
index 8b0ee8eaa6b30..8105c2cd84fa2 100644
--- a/src/wp-includes/l10n.php
+++ b/src/wp-includes/l10n.php
@@ -1286,7 +1286,7 @@ function load_script_textdomain( $handle, $domain = 'default', $path = '' ) {
  * Works like {@see load_script_textdomain()} but for script modules registered
  * via {@see wp_register_script_module()}.
  *
- * @since x.y.z
+ * @since 7.0.0
  *
  * @param string $id     The script module identifier.
  * @param string $domain Optional. Text domain. Default 'default'.
@@ -1389,7 +1389,7 @@ function load_script_module_textdomain( $id, $domain = 'default', $path = '' ) {
 	/**
 	 * Filters the relative path of script module source used for finding translation files.
 	 *
-	 * @since x.y.z
+	 * @since 7.0.0
 	 *
 	 * @param string|false $relative The relative path of the script module source. False if it could not be determined.
 	 * @param string       $src      The full source URL of the script module.
diff --git a/src/wp-includes/script-modules.php b/src/wp-includes/script-modules.php
index 04649358146b0..ab3d011b6f834 100644
--- a/src/wp-includes/script-modules.php
+++ b/src/wp-includes/script-modules.php
@@ -144,7 +144,7 @@ function wp_deregister_script_module( string $id ) {
  * Works similar to {@see wp_set_script_translations()} but for script modules
  * registered via {@see wp_register_script_module()}.
  *
- * @since x.y.z
+ * @since 7.0.0
  *
  * @see WP_Script_Modules::set_translations()
  *

From 1a0d9ca14f5995774309dd72fe68adf17f8fc95a Mon Sep 17 00:00:00 2001
From: Manzoor Wani <manzoorwani.jk@gmail.com>
Date: Sat, 11 Apr 2026 18:10:49 +0530
Subject: [PATCH 05/11] Simplify by using null coalescing operator

Co-authored-by: Weston Ruter <westonruter@gmail.com>
---
 src/wp-includes/class-wp-script-modules.php | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/src/wp-includes/class-wp-script-modules.php b/src/wp-includes/class-wp-script-modules.php
index 1ad593b32b545..7d136eed20031 100644
--- a/src/wp-includes/class-wp-script-modules.php
+++ b/src/wp-includes/class-wp-script-modules.php
@@ -938,14 +938,10 @@ private function sort_item_dependencies( string $id, array $import_types, array
 	 * @since 7.0.0
 	 *
 	 * @param string $id The script module identifier.
-	 * @return string|false The script module source URL, or false if not registered.
+	 * @return string|null The script module source URL, or null if not registered.
 	 */
-	public function get_registered_src( string $id ) {
-		if ( ! isset( $this->registered[ $id ] ) ) {
-			return false;
-		}
-
-		return $this->registered[ $id ]['src'];
+	public function get_registered_src( string $id ): ?string {
+		return $this->registered[ $id ]['src'] ?? null;
 	}
 
 	/**

From 05c6016f97e7c5aef834670e36e70390c201a0f1 Mon Sep 17 00:00:00 2001
From: Manzoor Wani <manzoorwani.jk@gmail.com>
Date: Sat, 11 Apr 2026 18:18:20 +0530
Subject: [PATCH 06/11] Use ES6 and PHP 7.4 syntax

Co-authored-by: Weston Ruter <westonruter@gmail.com>
---
 src/wp-includes/class-wp-script-modules.php | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/wp-includes/class-wp-script-modules.php b/src/wp-includes/class-wp-script-modules.php
index 7d136eed20031..a1352ef74dc41 100644
--- a/src/wp-includes/class-wp-script-modules.php
+++ b/src/wp-includes/class-wp-script-modules.php
@@ -394,12 +394,12 @@ public function print_script_module_translations(): void {
 			}
 
 			$output = <<<JS
-( function( domain, translations ) {
-	var localeData = translations.locale_data[ domain ] || translations.locale_data.messages;
+( ( domain, translations ) => {
+	const localeData = translations.locale_data[ domain ] || translations.locale_data.messages;
 	localeData[""].domain = domain;
 	wp.i18n.setLocaleData( localeData, domain );
 } )( "{$domain}", {$json_translations} );
-JS;
+			JS;
 
 			$source_url = rawurlencode( "{$id}-js-module-translations" );
 			$output    .= "\n//# sourceURL={$source_url}";

From de8090fe21436713f636d8651cffa7b1e5b3a17a Mon Sep 17 00:00:00 2001
From: Manzoor Wani <manzoorwani.jk@gmail.com>
Date: Sat, 11 Apr 2026 18:26:45 +0530
Subject: [PATCH 07/11] Make PHPCS happy

---
 src/wp-includes/class-wp-script-modules.php | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/wp-includes/class-wp-script-modules.php b/src/wp-includes/class-wp-script-modules.php
index a1352ef74dc41..39083423c5a3f 100644
--- a/src/wp-includes/class-wp-script-modules.php
+++ b/src/wp-includes/class-wp-script-modules.php
@@ -394,11 +394,11 @@ public function print_script_module_translations(): void {
 			}
 
 			$output = <<<JS
-( ( domain, translations ) => {
-	const localeData = translations.locale_data[ domain ] || translations.locale_data.messages;
-	localeData[""].domain = domain;
-	wp.i18n.setLocaleData( localeData, domain );
-} )( "{$domain}", {$json_translations} );
+			( ( domain, translations ) => {
+				const localeData = translations.locale_data[ domain ] || translations.locale_data.messages;
+				localeData[""].domain = domain;
+				wp.i18n.setLocaleData( localeData, domain );
+			} )( "{$domain}", {$json_translations} );
 			JS;
 
 			$source_url = rawurlencode( "{$id}-js-module-translations" );

From 44a1f56ce1f7aa489829655de2911e9274da5bf7 Mon Sep 17 00:00:00 2001
From: Manzoor Wani <manzoorwani.jk@gmail.com>
Date: Sat, 11 Apr 2026 18:29:34 +0530
Subject: [PATCH 08/11] Revert the change to heredoc indentation

---
 src/wp-includes/class-wp-script-modules.php | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/src/wp-includes/class-wp-script-modules.php b/src/wp-includes/class-wp-script-modules.php
index 39083423c5a3f..be2dc291ba8fb 100644
--- a/src/wp-includes/class-wp-script-modules.php
+++ b/src/wp-includes/class-wp-script-modules.php
@@ -394,12 +394,12 @@ public function print_script_module_translations(): void {
 			}
 
 			$output = <<<JS
-			( ( domain, translations ) => {
-				const localeData = translations.locale_data[ domain ] || translations.locale_data.messages;
-				localeData[""].domain = domain;
-				wp.i18n.setLocaleData( localeData, domain );
-			} )( "{$domain}", {$json_translations} );
-			JS;
+( ( domain, translations ) => {
+	const localeData = translations.locale_data[ domain ] || translations.locale_data.messages;
+	localeData[""].domain = domain;
+	wp.i18n.setLocaleData( localeData, domain );
+} )( "{$domain}", {$json_translations} );
+JS;
 
 			$source_url = rawurlencode( "{$id}-js-module-translations" );
 			$output    .= "\n//# sourceURL={$source_url}";

From eb78a18b6ac1b269621287b9fa76b4ccad41a02e Mon Sep 17 00:00:00 2001
From: Manzoor Wani <manzoorwani.jk@gmail.com>
Date: Sun, 12 Apr 2026 05:27:16 +0530
Subject: [PATCH 09/11] Tests: Align null return type for get_registered_src().

Update the test and the caller in load_script_module_textdomain() to
match the ?string return type of WP_Script_Modules::get_registered_src(),
which returns null (not false) for unregistered modules.
---
 src/wp-includes/l10n.php                               | 2 +-
 tests/phpunit/tests/script-modules/wpScriptModules.php | 6 +++---
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/wp-includes/l10n.php b/src/wp-includes/l10n.php
index 8105c2cd84fa2..a13f27ba13e57 100644
--- a/src/wp-includes/l10n.php
+++ b/src/wp-includes/l10n.php
@@ -1300,7 +1300,7 @@ function load_script_module_textdomain( $id, $domain = 'default', $path = '' ) {
 
 	$src = wp_script_modules()->get_registered_src( $id );
 
-	if ( false === $src ) {
+	if ( null === $src ) {
 		return false;
 	}
 
diff --git a/tests/phpunit/tests/script-modules/wpScriptModules.php b/tests/phpunit/tests/script-modules/wpScriptModules.php
index 9f5103d4d2ecd..e7e733c73b29e 100644
--- a/tests/phpunit/tests/script-modules/wpScriptModules.php
+++ b/tests/phpunit/tests/script-modules/wpScriptModules.php
@@ -2618,15 +2618,15 @@ public function test_wp_set_script_module_translations_returns_false_for_unregis
 	}
 
 	/**
-	 * Tests that get_registered_src() returns false for unregistered module.
+	 * Tests that get_registered_src() returns null for unregistered module.
 	 *
 	 * @ticket 65015
 	 *
 	 * @covers WP_Script_Modules::get_registered_src
 	 */
-	public function test_get_registered_src_returns_false_for_unregistered_module() {
+	public function test_get_registered_src_returns_null_for_unregistered_module() {
 		$result = $this->script_modules->get_registered_src( 'unregistered-module' );
-		$this->assertFalse( $result );
+		$this->assertNull( $result );
 	}
 
 	/**

From cee8f0c12c544b327d87876f51f515e34fb43701 Mon Sep 17 00:00:00 2001
From: Manzoor Wani <manzoorwani.jk@gmail.com>
Date: Mon, 13 Apr 2026 09:50:33 +0530
Subject: [PATCH 10/11] Apply suggestions from code review

Co-authored-by: Weston Ruter <westonruter@gmail.com>
---
 src/wp-includes/class-wp-script-modules.php | 22 +++++++++++++--------
 src/wp-includes/l10n.php                    |  5 +++--
 2 files changed, 17 insertions(+), 10 deletions(-)

diff --git a/src/wp-includes/class-wp-script-modules.php b/src/wp-includes/class-wp-script-modules.php
index be2dc291ba8fb..2fbb92ee6d518 100644
--- a/src/wp-includes/class-wp-script-modules.php
+++ b/src/wp-includes/class-wp-script-modules.php
@@ -90,7 +90,7 @@ class WP_Script_Modules {
 	 * @since 7.0.0
 	 * @var array<string, array{domain: string, path: string}>
 	 */
-	private $translations = array();
+	private array $translations = array();
 
 	/**
 	 * Registers the script module if no script module with that script module
@@ -393,14 +393,20 @@ public function print_script_module_translations(): void {
 				continue;
 			}
 
-			$output = <<<JS
-( ( domain, translations ) => {
-	const localeData = translations.locale_data[ domain ] || translations.locale_data.messages;
-	localeData[""].domain = domain;
-	wp.i18n.setLocaleData( localeData, domain );
-} )( "{$domain}", {$json_translations} );
-JS;
+			$set_local_data_js_function = <<<JS
+			( domain, translations ) => {
+				const localeData = translations.locale_data[ domain ] || translations.locale_data.messages;
+				localeData[""].domain = domain;
+				wp.i18n.setLocaleData( localeData, domain );
+			}
+			JS;
 
+			$output     = sprintf(
+				'( %s )( %s, %s );',
+				$set_local_data_js_function,
+				wp_json_encode( $domain ),
+				$json_translations
+			);
 			$source_url = rawurlencode( "{$id}-js-module-translations" );
 			$output    .= "\n//# sourceURL={$source_url}";
 			wp_print_inline_script_tag( $output, array( 'id' => "{$id}-js-module-translations" ) );
diff --git a/src/wp-includes/l10n.php b/src/wp-includes/l10n.php
index a13f27ba13e57..c846dce9f6bf6 100644
--- a/src/wp-includes/l10n.php
+++ b/src/wp-includes/l10n.php
@@ -1288,14 +1288,15 @@ function load_script_textdomain( $handle, $domain = 'default', $path = '' ) {
  *
  * @since 7.0.0
  *
+ * @global WP_Textdomain_Registry $wp_textdomain_registry WordPress Textdomain Registry.
+ *
  * @param string $id     The script module identifier.
  * @param string $domain Optional. Text domain. Default 'default'.
  * @param string $path   Optional. The full file path to the directory containing translation files.
  * @return string|false The JSON-encoded translated strings for the given script module and text domain.
  *                      False if there are none.
  */
-function load_script_module_textdomain( $id, $domain = 'default', $path = '' ) {
-	/** @var WP_Textdomain_Registry $wp_textdomain_registry */
+function load_script_module_textdomain( string $id, string $domain = 'default', string $path = '' ) {
 	global $wp_textdomain_registry;
 
 	$src = wp_script_modules()->get_registered_src( $id );

From c3380cc8a68346cfdc84ee82981a459ac8424609 Mon Sep 17 00:00:00 2001
From: Manzoor Wani <manzoorwani.jk@gmail.com>
Date: Mon, 13 Apr 2026 10:00:52 +0530
Subject: [PATCH 11/11] I18N: Extract shared helper for loading script
 translation files.

Refactor load_script_textdomain() and load_script_module_textdomain()
to share a private helper, _load_script_textdomain_from_src(), that
handles the path resolution and file lookup logic. Each public function
now only resolves the source URL for its respective registry and
delegates to the helper with the appropriate filter name.

Reduces duplication by ~88 lines while preserving behavior and the
existing load_script_textdomain_relative_path filter.
---
 src/wp-includes/l10n.php | 179 ++++++++++-----------------------------
 1 file changed, 45 insertions(+), 134 deletions(-)

diff --git a/src/wp-includes/l10n.php b/src/wp-includes/l10n.php
index c846dce9f6bf6..01dbf464364f3 100644
--- a/src/wp-includes/l10n.php
+++ b/src/wp-includes/l10n.php
@@ -1134,8 +1134,6 @@ function load_child_theme_textdomain( $domain, $path = false ) {
  *
  * @see WP_Scripts::set_translations()
  *
- * @global WP_Textdomain_Registry $wp_textdomain_registry WordPress Textdomain Registry.
- *
  * @param string $handle Name of the script to register a translation domain to.
  * @param string $domain Optional. Text domain. Default 'default'.
  * @param string $path   Optional. The full file path to the directory containing translation files.
@@ -1143,15 +1141,45 @@ function load_child_theme_textdomain( $domain, $path = false ) {
  *                      false if the script textdomain could not be loaded.
  */
 function load_script_textdomain( $handle, $domain = 'default', $path = '' ) {
-	/** @var WP_Textdomain_Registry $wp_textdomain_registry */
-	global $wp_textdomain_registry;
-
 	$wp_scripts = wp_scripts();
 
 	if ( ! isset( $wp_scripts->registered[ $handle ] ) ) {
 		return false;
 	}
 
+	$src = $wp_scripts->registered[ $handle ]->src;
+
+	if ( ! preg_match( '|^(https?:)?//|', $src ) && ! ( $wp_scripts->content_url && str_starts_with( $src, $wp_scripts->content_url ) ) ) {
+		$src = $wp_scripts->base_url . $src;
+	}
+
+	return _load_script_textdomain_from_src( $handle, $src, $domain, $path, 'load_script_textdomain_relative_path' );
+}
+
+/**
+ * Resolves and loads the translation JSON file for a given script or script module source URL.
+ *
+ * This is a shared implementation used by {@see load_script_textdomain()} and
+ * {@see load_script_module_textdomain()} to avoid duplicating the path
+ * resolution and file lookup logic.
+ *
+ * @since 7.0.0
+ * @access private
+ *
+ * @global WP_Textdomain_Registry $wp_textdomain_registry WordPress Textdomain Registry.
+ *
+ * @param string $handle      Name of the script or script module identifier to register a translation domain to.
+ * @param string $src         Absolute source URL of the script or script module.
+ * @param string $domain      Text domain.
+ * @param string $path        The full file path to the directory containing translation files,
+ *                            or an empty string to use the default path from the text domain registry.
+ * @param string $filter_name Name of the filter to apply to the resolved relative path
+ *                            ('load_script_textdomain_relative_path' or 'load_script_module_textdomain_relative_path').
+ * @return string|false The JSON-encoded translated strings on success, false otherwise.
+ */
+function _load_script_textdomain_from_src( $handle, $src, $domain, $path, $filter_name ) {
+	global $wp_textdomain_registry;
+
 	$locale = determine_locale();
 
 	if ( ! $path ) {
@@ -1172,12 +1200,6 @@ function load_script_textdomain( $handle, $domain = 'default', $path = '' ) {
 		}
 	}
 
-	$src = $wp_scripts->registered[ $handle ]->src;
-
-	if ( ! preg_match( '|^(https?:)?//|', $src ) && ! ( $wp_scripts->content_url && str_starts_with( $src, $wp_scripts->content_url ) ) ) {
-		$src = $wp_scripts->base_url . $src;
-	}
-
 	$relative       = false;
 	$languages_path = WP_LANG_DIR;
 
@@ -1242,14 +1264,20 @@ function load_script_textdomain( $handle, $domain = 'default', $path = '' ) {
 	}
 
 	/**
-	 * Filters the relative path of scripts used for finding translation files.
+	 * Filters the relative path used for finding translation files.
 	 *
-	 * @since 5.0.2
+	 * The filter name is either `load_script_textdomain_relative_path` for
+	 * classic scripts or `load_script_module_textdomain_relative_path` for
+	 * script modules.
 	 *
-	 * @param string|false $relative The relative path of the script. False if it could not be determined.
-	 * @param string       $src      The full source URL of the script.
+	 * @since 5.0.2 The `load_script_textdomain_relative_path` filter was added.
+	 * @since 7.0.0 The `load_script_module_textdomain_relative_path` filter was added.
+	 *
+	 * @param string|false $relative The relative path of the script or script module source.
+	 *                               False if it could not be determined.
+	 * @param string       $src      The full source URL of the script or script module.
 	 */
-	$relative = apply_filters( 'load_script_textdomain_relative_path', $relative, $src );
+	$relative = apply_filters( $filter_name, $relative, $src );
 
 	// If the source is not from WP.
 	if ( false === $relative ) {
@@ -1288,8 +1316,6 @@ function load_script_textdomain( $handle, $domain = 'default', $path = '' ) {
  *
  * @since 7.0.0
  *
- * @global WP_Textdomain_Registry $wp_textdomain_registry WordPress Textdomain Registry.
- *
  * @param string $id     The script module identifier.
  * @param string $domain Optional. Text domain. Default 'default'.
  * @param string $path   Optional. The full file path to the directory containing translation files.
@@ -1297,133 +1323,18 @@ function load_script_textdomain( $handle, $domain = 'default', $path = '' ) {
  *                      False if there are none.
  */
 function load_script_module_textdomain( string $id, string $domain = 'default', string $path = '' ) {
-	global $wp_textdomain_registry;
-
 	$src = wp_script_modules()->get_registered_src( $id );
 
 	if ( null === $src ) {
 		return false;
 	}
 
-	$locale = determine_locale();
-
-	if ( ! $path ) {
-		$path = $wp_textdomain_registry->get( $domain, $locale );
-	}
-
-	$path = untrailingslashit( $path );
-
-	// If a path was given and the handle file exists simply return it.
-	$file_base       = 'default' === $domain ? $locale : $domain . '-' . $locale;
-	$handle_filename = $file_base . '-' . $id . '.json';
-
-	if ( $path ) {
-		$translations = load_script_translations( $path . '/' . $handle_filename, $id, $domain );
-
-		if ( $translations ) {
-			return $translations;
-		}
-	}
-
 	// Ensure src is an absolute URL for path resolution.
 	if ( ! preg_match( '|^(https?:)?//|', $src ) ) {
 		$src = site_url( $src );
 	}
 
-	$relative       = false;
-	$languages_path = WP_LANG_DIR;
-
-	$src_url     = wp_parse_url( $src );
-	$content_url = wp_parse_url( content_url() );
-	$plugins_url = wp_parse_url( plugins_url() );
-	$site_url    = wp_parse_url( site_url() );
-	$theme_root  = get_theme_root();
-
-	// If the host is the same or it's a relative URL.
-	if (
-		( ! isset( $content_url['path'] ) || str_starts_with( $src_url['path'], $content_url['path'] ) ) &&
-		( ! isset( $src_url['host'] ) || ! isset( $content_url['host'] ) || $src_url['host'] === $content_url['host'] )
-	) {
-		// Make the src relative the specific plugin or theme.
-		if ( isset( $content_url['path'] ) ) {
-			$relative = substr( $src_url['path'], strlen( $content_url['path'] ) );
-		} else {
-			$relative = $src_url['path'];
-		}
-		$relative = trim( $relative, '/' );
-		$relative = explode( '/', $relative );
-
-		$theme_dir = array_slice( explode( '/', $theme_root ), -1 );
-		$dirname   = $theme_dir[0] === $relative[0] ? 'themes' : 'plugins';
-
-		$languages_path = WP_LANG_DIR . '/' . $dirname;
-
-		$relative = array_slice( $relative, 2 ); // Remove plugins/<plugin name> or themes/<theme name>.
-		$relative = implode( '/', $relative );
-	} elseif (
-		( ! isset( $plugins_url['path'] ) || str_starts_with( $src_url['path'], $plugins_url['path'] ) ) &&
-		( ! isset( $src_url['host'] ) || ! isset( $plugins_url['host'] ) || $src_url['host'] === $plugins_url['host'] )
-	) {
-		// Make the src relative the specific plugin.
-		if ( isset( $plugins_url['path'] ) ) {
-			$relative = substr( $src_url['path'], strlen( $plugins_url['path'] ) );
-		} else {
-			$relative = $src_url['path'];
-		}
-		$relative = trim( $relative, '/' );
-		$relative = explode( '/', $relative );
-
-		$languages_path = WP_LANG_DIR . '/plugins';
-
-		$relative = array_slice( $relative, 1 ); // Remove <plugin name>.
-		$relative = implode( '/', $relative );
-	} elseif ( ! isset( $src_url['host'] ) || ! isset( $site_url['host'] ) || $src_url['host'] === $site_url['host'] ) {
-		if ( ! isset( $site_url['path'] ) ) {
-			$relative = trim( $src_url['path'], '/' );
-		} elseif ( str_starts_with( $src_url['path'], trailingslashit( $site_url['path'] ) ) ) {
-			// Make the src relative to the WP root.
-			$relative = substr( $src_url['path'], strlen( $site_url['path'] ) );
-			$relative = trim( $relative, '/' );
-		}
-	}
-
-	/**
-	 * Filters the relative path of script module source used for finding translation files.
-	 *
-	 * @since 7.0.0
-	 *
-	 * @param string|false $relative The relative path of the script module source. False if it could not be determined.
-	 * @param string       $src      The full source URL of the script module.
-	 */
-	$relative = apply_filters( 'load_script_module_textdomain_relative_path', $relative, $src );
-
-	// If the source is not from WP.
-	if ( false === $relative ) {
-		return load_script_translations( false, $id, $domain );
-	}
-
-	// Translations are always based on the unminified filename.
-	if ( str_ends_with( $relative, '.min.js' ) ) {
-		$relative = substr( $relative, 0, -7 ) . '.js';
-	}
-
-	$md5_filename = $file_base . '-' . md5( $relative ) . '.json';
-
-	if ( $path ) {
-		$translations = load_script_translations( $path . '/' . $md5_filename, $id, $domain );
-
-		if ( $translations ) {
-			return $translations;
-		}
-	}
-
-	$translations = load_script_translations( $languages_path . '/' . $md5_filename, $id, $domain );
-
-	if ( $translations ) {
-		return $translations;
-	}
-
-	return load_script_translations( false, $id, $domain );
+	return _load_script_textdomain_from_src( $id, $src, $domain, $path, 'load_script_module_textdomain_relative_path' );
 }
 
 /**