diff --git a/src/wp-includes/class-wp-script-modules.php b/src/wp-includes/class-wp-script-modules.php
index 058e5f0eef0e6..48a97ff4acf16 100644
--- a/src/wp-includes/class-wp-script-modules.php
+++ b/src/wp-includes/class-wp-script-modules.php
@@ -12,6 +12,15 @@
  * Core class used to register script modules.
  *
  * @since 6.5.0
+ *
+ * @phpstan-type ScriptModule array{
+ *     src: string,
+ *     version: string|false|null,
+ *     dependencies: array<int, array{ id: string, import: 'static'|'dynamic' }>,
+ *     in_footer: bool,
+ *     fetchpriority: 'auto'|'low'|'high',
+ *     translations?: array{ textdomain: string, path: string },
+ * }
  */
 class WP_Script_Modules {
 	/**
@@ -19,6 +28,7 @@ class WP_Script_Modules {
 	 *
 	 * @since 6.5.0
 	 * @var array<string, array<string, mixed>>
+	 * @phpstan-var array<string, ScriptModule>
 	 */
 	private $registered = array();
 
@@ -328,6 +338,89 @@ public function deregister( string $id ) {
 		unset( $this->registered[ $id ] );
 	}
 
+	/**
+	 * Overrides the text domain and path used to load translations for a script module.
+	 *
+	 * This is only needed for modules whose text domain differs from 'default'
+	 * or whose translation files live outside the standard locations, for
+	 * example plugin modules that register their own text domain. Translations
+	 * for modules that use the default domain are loaded automatically by
+	 * {@see WP_Script_Modules::print_script_module_translations()}.
+	 *
+	 * @since 7.0.0
+	 *
+	 * @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->registered[ $id ]['translations'] = array(
+			'textdomain' => $domain,
+			'path'       => $path,
+		);
+
+		return true;
+	}
+
+	/**
+	 * Prints translations for all enqueued script modules.
+	 *
+	 * 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.
+	 *
+	 * Auto-detects the text domain and translation path for each module from
+	 * its source URL. Modules whose text domain or path differs from the
+	 * defaults can opt into a specific domain/path via
+	 * {@see WP_Script_Modules::set_translations()}.
+	 *
+	 * @since 7.0.0
+	 */
+	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 );
+
+		$set_locale_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;
+
+		foreach ( $module_ids as $id ) {
+			$domain = $this->registered[ $id ]['translations']['textdomain'] ?? 'default';
+			$path   = $this->registered[ $id ]['translations']['path'] ?? '';
+
+			$json_translations = load_script_module_textdomain( $id, $domain, $path );
+
+			if ( ! $json_translations ) {
+				continue;
+			}
+
+			$output     = sprintf(
+				'( %s )( %s, %s );',
+				$set_locale_data_js_function,
+				wp_json_encode( $domain, JSON_HEX_TAG | JSON_UNESCAPED_SLASHES ),
+				$json_translations
+			);
+			$script_id  = "wp-script-module-translation-data-{$id}";
+			$output    .= "\n//# sourceURL=" . rawurlencode( $script_id );
+
+			// Ensure wp-i18n is printed; the inline script below relies on wp.i18n.setLocaleData().
+			if ( ! wp_script_is( 'wp-i18n', 'done' ) ) {
+				wp_scripts()->do_items( array( 'wp-i18n' ) );
+			}
+
+			wp_print_inline_script_tag( $output, array( 'id' => $script_id ) );
+		}
+	}
+
 	/**
 	 * Adds the hooks to print the import map, enqueued script modules and script
 	 * module preloads.
@@ -359,6 +452,15 @@ public function add_hooks() {
 		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 );
@@ -631,6 +733,7 @@ private function get_import_map(): array {
 	 * @since 6.5.0
 	 *
 	 * @return array<string, array<string, mixed>> Script modules marked for enqueue, keyed by script module identifier.
+	 * @phpstan-return array<string, ScriptModule>
 	 */
 	private function get_marked_for_enqueue(): array {
 		return wp_array_slice_assoc(
@@ -652,6 +755,7 @@ private function get_marked_for_enqueue(): array {
 	 * @param string[] $import_types Optional. Import types of dependencies to retrieve: 'static', 'dynamic', or both.
 	 *                                         Default is both.
 	 * @return array<string, array<string, mixed>> List of dependencies, keyed by script module identifier.
+	 * @phpstan-return array<string, ScriptModule>
 	 */
 	private function get_dependencies( array $ids, array $import_types = array( 'static', 'dynamic' ) ): array {
 		$all_dependencies = array();
@@ -840,6 +944,19 @@ private function sort_item_dependencies( string $id, array $import_types, array
 		return true;
 	}
 
+	/**
+	 * Gets the data for a registered script module.
+	 *
+	 * @since 7.0.0
+	 *
+	 * @param string $id The script module identifier.
+	 * @return array|null The script module data, or null if not registered.
+	 * @phpstan-return ScriptModule|null
+	 */
+	public function get_registered( string $id ): ?array {
+		return $this->registered[ $id ] ?? null;
+	}
+
 	/**
 	 * 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..ee2dfc5dd308b 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 +1141,73 @@ 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, false );
+}
+
+/**
+ * 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 7.0.0
+ *
+ * @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( string $id, string $domain = 'default', string $path = '' ) {
+	$module = wp_script_modules()->get_registered( $id );
+	if ( null === $module ) {
+		return false;
+	}
+	$src = $module['src'];
+
+	// Ensure src is an absolute URL for path resolution.
+	if ( ! preg_match( '|^(https?:)?//|', $src ) ) {
+		$src = site_url( $src );
+	}
+
+	return _load_script_textdomain_from_src( $id, $src, $domain, $path, true );
+}
+
+/**
+ * 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 bool   $is_module Whether the source belongs to a script module (true) or a classic script (false).
+ * @return string|false The JSON-encoded translated strings on success, false otherwise.
+ */
+function _load_script_textdomain_from_src( string $handle, string $src, string $domain, string $path, bool $is_module ) {
+	global $wp_textdomain_registry;
+
 	$locale = determine_locale();
 
 	if ( ! $path ) {
@@ -1172,12 +1228,6 @@ 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;
 
@@ -1245,11 +1295,13 @@ function load_script_textdomain( $handle, $domain = 'default', $path = '' ) {
 	 * Filters the relative path of scripts used for finding translation files.
 	 *
 	 * @since 5.0.2
+	 * @since 7.0.0 The `$is_module` parameter was added.
 	 *
-	 * @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.
+	 * @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.
+	 * @param bool         $is_module Whether the source belongs to a script module (true) or a classic script (false).
 	 */
-	$relative = apply_filters( 'load_script_textdomain_relative_path', $relative, $src );
+	$relative = apply_filters( 'load_script_textdomain_relative_path', $relative, $src, $is_module );
 
 	// If the source is not from WP.
 	if ( false === $relative ) {
diff --git a/src/wp-includes/script-modules.php b/src/wp-includes/script-modules.php
index 3e5c39bff18d5..b3a89fdf71844 100644
--- a/src/wp-includes/script-modules.php
+++ b/src/wp-includes/script-modules.php
@@ -138,6 +138,27 @@ function wp_deregister_script_module( string $id ) {
 	wp_script_modules()->deregister( $id );
 }
 
+/**
+ * Overrides the text domain and path used to load translations for a script module.
+ *
+ * Translations for script modules are loaded automatically from the default
+ * text domain and language directory. Use this function only when a module's
+ * text domain differs from `'default'` or when translation files live outside
+ * the standard location, for example plugin modules using their own text domain.
+ *
+ * @since 7.0.0
+ *
+ * @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 registered, false if the module is not registered.
+ */
+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.
  *
diff --git a/tests/phpunit/tests/script-modules/wpScriptModules.php b/tests/phpunit/tests/script-modules/wpScriptModules.php
index 4f647c6a3d2e0..330736431dffd 100644
--- a/tests/phpunit/tests/script-modules/wpScriptModules.php
+++ b/tests/phpunit/tests/script-modules/wpScriptModules.php
@@ -1986,6 +1986,23 @@ private function get_registered_script_modules( WP_Script_Modules $script_module
 		return $registered_property->getValue( $script_modules );
 	}
 
+	/**
+	 * Returns the inline text of the first SCRIPT tag with the given id, or null if not found.
+	 *
+	 * @param string $markup The HTML markup to search.
+	 * @param string $id     The id attribute to match.
+	 * @return string|null The inline script text, or null if no matching tag was found.
+	 */
+	private function get_inline_script_text( string $markup, string $id ): ?string {
+		$processor = new WP_HTML_Tag_Processor( $markup );
+		while ( $processor->next_tag( 'SCRIPT' ) ) {
+			if ( $id === $processor->get_attribute( 'id' ) ) {
+				return $processor->get_modifiable_text();
+			}
+		}
+		return null;
+	}
+
 	/**
 	 * Data provider.
 	 *
@@ -2566,4 +2583,293 @@ 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
+	 * @covers WP_Script_Modules::set_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
+	 * @covers WP_Script_Modules::set_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() returns null for unregistered module.
+	 *
+	 * @ticket 65015
+	 *
+	 * @covers WP_Script_Modules::get_registered
+	 */
+	public function test_get_registered_returns_null_for_unregistered_module() {
+		$result = $this->script_modules->get_registered( 'unregistered-module' );
+		$this->assertNull( $result );
+	}
+
+	/**
+	 * Tests that get_registered() returns correct src for registered module.
+	 *
+	 * @ticket 65015
+	 *
+	 * @covers WP_Script_Modules::get_registered
+	 */
+	public function test_get_registered_returns_array_for_registered_module() {
+		$this->script_modules->register( 'test-module', '/test-module.js' );
+		$result = $this->script_modules->get_registered( 'test-module' );
+		$this->assertIsArray( $result, 'get_registered() should return an array for a registered module.' );
+		$this->assertSame( '/test-module.js', $result['src'], 'src should match the value passed to register().' );
+		$this->assertFalse( $result['version'], 'version should default to false.' );
+		$this->assertSame( array(), $result['dependencies'], 'dependencies should default to an empty array.' );
+		$this->assertFalse( $result['in_footer'], 'in_footer should default to false.' );
+		$this->assertSame( 'auto', $result['fetchpriority'], 'fetchpriority should default to auto.' );
+	}
+
+	/**
+	 * 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' );
+
+		$output = get_echo( array( $this->script_modules, 'print_script_module_translations' ) );
+
+		$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' );
+
+		$output = get_echo( array( $this->script_modules, 'print_script_module_translations' ) );
+
+		$this->assertEmpty( $output );
+	}
+
+	/**
+	 * Tests that print_script_module_translations() auto-detects translations
+	 * for enqueued modules without requiring an explicit set_translations() call.
+	 *
+	 * @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' );
+
+		// 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
+		);
+
+		$filtered = array();
+		add_filter(
+			'load_script_textdomain_relative_path',
+			static function ( $relative, $src, $is_module ) use ( &$filtered ) {
+				$filtered[] = compact( 'relative', 'src', 'is_module' );
+				return $relative;
+			},
+			10,
+			3
+		);
+
+		$output = get_echo( array( $this->script_modules, 'print_script_module_translations' ) );
+
+		$this->assertCount( 1, $filtered, 'load_script_textdomain_relative_path filter should fire once for the enqueued module.' );
+		foreach ( $filtered as $filter_args ) {
+			$this->assertIsString( $filter_args['relative'], 'Filter should receive a string $relative argument.' );
+			$this->assertIsString( $filter_args['src'], 'Filter should receive a string $src argument.' );
+			$this->assertTrue( $filter_args['is_module'], 'Filter should receive $is_module=true for script modules.' );
+		}
+
+		$script_text = $this->get_inline_script_text( $output, 'wp-script-module-translation-data-test-module' );
+		$this->assertNotNull( $script_text, 'Translation inline script should be printed with the expected ID.' );
+		$this->assertStringContainsString( 'wp.i18n.setLocaleData', $script_text, 'Output should call wp.i18n.setLocaleData().' );
+		$this->assertStringContainsString( 'Hola', $script_text, '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
+	 * @covers ::load_script_module_textdomain
+	 */
+	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' );
+
+		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
+		);
+
+		$filtered = array();
+		add_filter(
+			'load_script_textdomain_relative_path',
+			static function ( $relative, $src, $is_module ) use ( &$filtered ) {
+				$filtered[] = compact( 'relative', 'src', 'is_module' );
+				return $relative;
+			},
+			10,
+			3
+		);
+
+		$output = get_echo( array( $this->script_modules, 'print_script_module_translations' ) );
+
+		// With auto-detection, the filter fires for every enqueued module and its dependencies.
+		$this->assertCount( 2, $filtered, 'load_script_textdomain_relative_path filter should fire for the enqueued module and its dependency.' );
+		foreach ( $filtered as $filter_args ) {
+			$this->assertIsString( $filter_args['relative'], 'Filter should receive a string $relative argument.' );
+			$this->assertIsString( $filter_args['src'], 'Filter should receive a string $src argument.' );
+			$this->assertTrue( $filter_args['is_module'], 'Filter should receive $is_module=true for script modules.' );
+		}
+
+		$script_text = $this->get_inline_script_text( $output, 'wp-script-module-translation-data-dep-module' );
+		$this->assertNotNull( $script_text, 'Dependency module translations should be printed.' );
+		$this->assertStringContainsString( 'Mundo', $script_text, 'Output should contain the dependency translation.' );
+	}
+
+	/**
+	 * Tests that set_translations() can override the auto-detected text domain.
+	 *
+	 * @ticket 65015
+	 *
+	 * @covers WP_Script_Modules::print_script_module_translations
+	 * @covers WP_Script_Modules::set_translations
+	 */
+	public function test_print_script_module_translations_respects_set_translations_override() {
+		$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', 'my-plugin' );
+
+		$seen_domain = null;
+		add_filter(
+			'pre_load_script_translations',
+			static function ( $translations, $file, $handle, $domain ) use ( &$seen_domain ) {
+				if ( 'test-module' !== $handle ) {
+					return $translations;
+				}
+				$seen_domain = $domain;
+				return wp_json_encode(
+					array(
+						'locale_data' => array(
+							'messages' => array(
+								''      => array(
+									'domain' => 'my-plugin',
+									'lang'   => 'es',
+								),
+								'Hello' => array( 'Hola' ),
+							),
+						),
+					)
+				);
+			},
+			10,
+			4
+		);
+
+		$output = get_echo( array( $this->script_modules, 'print_script_module_translations' ) );
+
+		$this->assertSame( 'my-plugin', $seen_domain, 'load_script_module_textdomain() should be called with the overridden domain.' );
+		$this->assertStringContainsString( 'Hola', $output, 'Output should contain the translated string loaded under the overridden domain.' );
+	}
 }