[jorgefilipecosta]

Core PR: WordPress/wordpress-develop#14260
Needed by #84643 and #83368.

Right now some strings of script modules show in English even when the language packs translate them:

• WordPress only prints the translations of the enqueued script modules and their dependencies. A script module that only a classic script imports, through its module_dependencies, loads with no translations. Actions API: Extract the core actions into the @wordpress/core-actions script modules #84643 moves the DataViews core actions into script modules that wp-editor imports this way, and Fields API #83368 does the same for the core fields. Their strings are translated today because they are bundled into wp-editor, so without a fix they would go back to English.
• The script modules that the plugin serves look their translations up in languages/plugins/{locale}-{md5}.json, but the plugin language packs name these files gutenberg-{locale}-{md5}.json. This already affects released screens, e.g. most of Settings > Connectors is in English.
• The full-page template of wp-build never prints the translations of script modules, so full-page screens like the extensible site editor show the strings of their script modules in English.

This PR:

• Replaces the hooks of WP_Script_Modules::print_script_module_translations() with a function that also prints the translations of the script modules that classic scripts depend on, and of their dependencies. It only uses public methods, and prints each script module once whether or not WordPress includes the fix from the core PR.
• Makes gutenberg_override_translation_file() use the plugin translation files for the script modules served from the plugin's build/ folder too, as it does for the plugin's scripts.
• Makes the full-page template of wp-build fire admin_print_footer_scripts, as wp-admin/admin-footer.php does, instead of calling the footer printers one by one.
• Adds a test plugin with an e2e test for the first change, and PHPUnit tests for the first two.

Some notes:

• The Gutenberg function works like the core method with the fix, with one difference: WordPress skips an enqueued script module whose dependencies are not all registered, since it can't load, while the Gutenberg function still prints its translations, which go unused. I considered porting the dependency sorting of the core class, but it's private and the difference has no visible effect. So I opted for a plain walk over get_registered().
• WordPress hooks all the footer printers to admin_print_footer_scripts since 6.7, which the template already requires for print_script_module_data(). Besides the translations, the full-page screens now also get the late styles and the live regions of @wordpress/a11y, and print the script modules before the classic scripts, like the other admin pages.
• https://core.trac.wordpress.org/ticket/60234 discusses loading the translations of dynamically imported script modules on import, instead of printing them with the page. Both PRs follow what WordPress does today for the dynamic dependencies of enqueued script modules.
• I checked Actions API: Extract the core actions into the @wordpress/core-actions script modules #84643 merged with this PR, in Portuguese (Portugal), with language pack files that move the strings of the core actions from build/scripts/editor/index.js to the build/modules/core-actions/ files, as GlotPress will once that PR ships. "Export as JSON" shows as "Exportar como JSON" in the pattern actions of the site editor only with the first two changes, and in the extensible site editor only with all three. Without them, the post editor prints no translations for the @wordpress/core-actions script modules either.
• I compared the HTML of 15 admin and front-end pages before and after this PR, in English and in Portuguese, on WordPress trunk, and checked the main ones again with a classic theme and on WordPress 7.0.7. The only differences are the new translation scripts and, in the extensible site editor, the footer order and the live regions. No page logs new PHP notices or console errors.

Before

The test page of the e2e test, where one line comes from an enqueued script module and the other from a script module that only a classic script imports:

Settings > Connectors, in Portuguese (Portugal):

The extensible site editor, in Portuguese (Portugal), where the back link at the top of the sidebar comes from a script module:

After

Testing Instructions

Go through the steps on trunk first, then on this branch after npm run build.

1. Start the test environment with npm run wp-env-test start.

2. Save this snippet as packages/e2e-tests/mu-plugins/module-translations-test.php, which the test environment loads as a must-use plugin. It registers a test/hello script module that only a classic script imports, gives it a translation, and makes it show __( 'Hello' ) in an alert on the Dashboard:

   <?php
   add_action( 'load-index.php', function () {
   	wp_register_script_module( 'test/hello', 'data:text/javascript,alert(wp.i18n.__("Hello"))', array(), null );
   	wp_register_script( 'test-classic', false, array( 'wp-i18n' ), false, array( 'in_footer' => true, 'module_dependencies' => array( 'test/hello' ) ) );
   	wp_add_inline_script( 'test-classic', 'addEventListener("DOMContentLoaded",()=>import("test/hello"))' );
   	wp_enqueue_script( 'test-classic' );
   } );
   add_filter( 'pre_load_script_translations', function ( $translations, $file, $handle ) {
   	return 'test/hello' === $handle ? '{"locale_data":{"messages":{"":{},"Hello":["Hello (translated)"]}}}' : $translations;
   }, 10, 3 );
   

3. Open http://localhost:8889/wp-admin/. On trunk, the alert says "Hello". With this PR, it says "Hello (translated)".

4. Install Portuguese (Portugal) and switch the admin user to it:

   npm run wp-env-test -- run cli wp language core install pt_PT
   npm run wp-env-test -- run cli wp language plugin install gutenberg pt_PT
   npm run wp-env-test -- run cli wp user meta update admin locale pt_PT
   

5. Open http://localhost:8889/wp-admin/options-general.php?page=options-connectors-wp-admin. On trunk, the title, the description, the AI plugin card and the note at the bottom are in English. With this PR, all of the page is in Portuguese.

6. Open http://localhost:8889/wp-admin/admin.php?page=site-editor-v2. On trunk, the back link at the top of the sidebar reads "Dashboard". With this PR, it reads "Painel".

7. Delete the snippet and switch the admin user back to English with npm run wp-env-test -- run cli wp user meta delete admin locale. Then run npm run test:unit:php:base -- --filter 'Gutenberg_Script_Module_Translations_Test|Override_Translation_File_Test|Tests_Fields_API' and npm run test:e2e -- test/e2e/specs/admin/script-module-translations.spec.js.

AI usage disclosure: fix and description drafted with AI assistance and reviewed by me.

[github-actions]

🤖 PR meta 🤖

📦 Bundle size

Size Change: 0 B

Total Size: 8.58 MB

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⚡ Performance

Show the results

Client side metrics exclude the server response time.

front-end-block-theme

Metric	7d43812	trunk	% Change
timeToFirstByte	52.55 ms +15.22% -3.14%	52.35 ms +14.61% -3.15%	0.38%
largestContentfulPaint	94 ms +2.13% -4.26%	88 ms +6.82% -4.55%	6.82%
lcpMinusTtfb	37.9 ms +11.48% -10.55%	33.55 ms +6.86% -3.28%	12.97%
wpBeforeTemplate	27.81 ms +19.02% -1.76%	27.89 ms +16.13% -2.37%	-0.29%
wpTemplate	20.89 ms +3.88% -3.35%	21.08 ms +4.55% -6.02%	-0.9%
wpTotal	49.03 ms +14.89% -3.08%	48.94 ms +13.34% -4%	0.18%
wpMemoryUsage	7.62 MB +0% -0%	7.58 MB +0% -0%	0.46%
wpDbQueries	17 +0% -0%	17 +0% -0%	0%

front-end-classic-theme

Metric	7d43812	trunk	% Change
timeToFirstByte	40.2 ms +7.84% -1.37%	43.95 ms +10.69% -0.68%	-8.53%
largestContentfulPaint	88 ms +2.27% -0%	96 ms +4.17% -0%	-8.33%
lcpMinusTtfb	47.35 ms +1.8% -3.59%	52.35 ms +1.05% -0.57%	-9.55%
wpBeforeTemplate	25.39 ms +4.92% -0.39%	25.66 ms +8.42% -2.1%	-1.05%
wpTemplate	11.83 ms +3.04% -1.27%	15.63 ms +3.01% -1.54%	-24.31%
wpTotal	37.41 ms +8.31% -1.31%	41.08 ms +10.78% -1.12%	-8.93%
wpMemoryUsage	6.14 MB +0% -0%	6.21 MB +0% -0%	-1.07%
wpDbQueries	10 +0% -0%	14 +0% -0%	-28.57%

media-processing

Metric	7d43812	trunk	% Change
mediaProcessingJpeg	401.92 ms +0.17% -0.36%	400.35 ms +0.7% -0.45%	0.39%
mediaProcessingAvif	6026.7 ms +0.34% -0.01%	6043.77 ms +0.09% -0.1%	-0.28%
mediaProcessingJpegToAvif	4158.68 ms +0.05% -0.5%	4165.03 ms +0.29% -0.18%	-0.15%

media-upload

Metric	7d43812	trunk	% Change
jpegUploadProcessing	1440.6 ms +35.32% -2.64%	1415.08 ms +0.57% -0.88%	1.8%
pngUploadProcessing	200.93 ms +5.04% -17.35%	175.95 ms +18.23% -2.63%	14.2%
largeJpegUploadProcessing	1402.65 ms +0.71% -0.46%	1408.31 ms +0.39% -0.66%	-0.4%
multipleImageUploadProcessing	1542.43 ms +0.58% -0.91%	1562.24 ms +8.96% -2%	-1.27%

post-editor

Metric	7d43812	trunk	% Change
serverResponse	514.82 ms +4.92% -1.87%	519.09 ms +3.12% -3.97%	-0.82%
firstPaint	252.35 ms +35.19% -9.89%	474.12 ms +6.82% -39.5%	-46.78%
domContentLoaded	1220.59 ms +1.12% -1.8%	1190.42 ms +1.44% -1.6%	2.53%
loaded	1222.09 ms +1.14% -1.79%	1191.68 ms +1.44% -1.59%	2.55%
firstContentfulPaint	526.62 ms +2.12% -1.87%	508.64 ms +1.8% -3.25%	3.53%
firstBlock	3555.51 ms +1.55% -0.8%	3540.54 ms +0.76% -1.18%	0.42%
type	18.15 ms +14.38% -3.75%	17.87 ms +2.13% -2.91%	1.57%
typeWithoutInspector	18.28 ms +4.16% -3.88%	18.35 ms +8.99% -3.38%	-0.38%
typeWithTopToolbar	22.42 ms +11.02% -3.43%	24.28 ms +5.93% -3.17%	-7.66%
typeContainer	8.63 ms +10.89% -5.68%	8.76 ms +3.08% -6.28%	-1.48%
focus	125.72 ms +7.61% -4.84%	120.2 ms +6.86% -4.21%	4.59%
firstFocus	238.4 ms +0% -0%	220.06 ms +0% -0%	8.33%
selectAll	606.39 ms +0.43% -4.99%	578.93 ms +0.25% -3.34%	4.74%
listViewOpen	80.68 ms +6.73% -2.97%	83.74 ms +2.44% -3.34%	-3.65%
inserterOpen	43.83 ms +7.03% -9.67%	41.13 ms +6.2% -12.42%	6.56%
inserterHover	12.57 ms +13.84% -6.52%	12.03 ms +9.23% -9.06%	4.49%
inserterSearch	8.57 ms +8.28% -6.88%	8.52 ms +1.88% -3.17%	0.59%
loadPatterns	648.59 ms +3.67% -3.03%	628.95 ms +3.35% -4.02%	3.12%
wpTotal	501.58 ms +5.38% -1.56%	507.75 ms +2.99% -4.06%	-1.22%
wpMemoryUsage	13.35 MB +0% -0%	13.31 MB +0% -0%	0.28%
wpDbQueries	53.5 +0.93% -0.93%	54 +0% -1.85%	-0.93%

site-editor

Metric	7d43812	trunk	% Change
serverResponse	519.7 ms +0.97% -10.8%	527.45 ms +3.23% -0.6%	-1.47%
firstPaint	285.82 ms +17.35% -3.63%	266.59 ms +23.37% -8.08%	7.21%
domContentLoaded	1273.5 ms +0.98% -1.53%	1312.17 ms +1.56% -2.62%	-2.95%
loaded	1274.79 ms +0.98% -1.5%	1313.68 ms +1.55% -2.63%	-2.96%
firstContentfulPaint	525.62 ms +2.95% -0.48%	544.38 ms +0.99% -2.46%	-3.45%
firstBlock	4746.3 ms +1.09% -0.63%	4886.37 ms +0.67% -0.75%	-2.87%
type	19.54 ms +13.2% -2.2%	20.13 ms +2.98% -3.43%	-2.93%
navigate	121.78 ms +15.82% -3.19%	120.97 ms +9.15% -3.59%	0.67%
loadPatterns	1356.9 ms +10.98% -2.3%	1372.84 ms +9.57% -6.41%	-1.16%
loadPages	1033.74 ms +1.43% -1.16%	1013.4 ms +1.68% -0.52%	2.01%
wpTotal	508.71 ms +0.84% -11.16%	515.92 ms +3.32% -0.63%	-1.4%
wpMemoryUsage	12.38 MB +0% -0%	12.36 MB +0% -0%	0.13%
wpDbQueries	43 +2.33% -0%	43 +2.33% -0%	0%

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🏁 Flaky tests

Some tests passed with failed attempts. The failures may not be related to this commit but are still reported for visibility. See the documentation for more information.

refuses the drop and uploads nothing in /test/e2e/specs/editor/various/single-file-placeholder-drop.spec.js, passed after 1 failed attempt.

Error: expect(received).toHaveLength(expected)

Expected length: 0
Received length: 1
Received array:  [{"_links": {"about": [{"href": "http://localhost:8889/wp-json/wp/v2/types/attachment"}], "author": [{"embeddable": true, "href": "http://localhost:8889/wp-json/wp/v2/users/1"}], "collection": [{"href": "http://localhost:8889/wp-json/wp/v2/media"}], "curies": [{"href": "https://api.w.org/{rel}", "name": "wp", "templated": true}], "replies": [{"embeddable": true, "href": "http://localhost:8889/wp-json/wp/v2/comments?post=277"}], "self": [{"href": "http://localhost:8889/wp-json/wp/v2/media/277", "targetHints": {"allow": ["GET", "POST", "PUT", "PATCH", "DELETE"]}}], "wp:attached-to": [{"embeddable": true, "href": "http://localhost:8889/wp-json/wp/v2/posts/276", "id": 276, "post_type": "post"}]}, "alt_text": "", "author": 1, "caption": {"rendered": ""}, "class_list": ["post-277", "attachment", "type-attachment", "status-inherit", "hentry", "entry"], "comment_status": "open", "date": "2026-10-13T21:36:14", "date_gmt": "2026-10-13T21:36:14", "description": {"rendered": "<p class=\"attachment\"><a href='http://localhost:8889/wp-content/uploads/2026/10/07b41c67-c13f-4110-92c9-dd98e58cf1a7.png'><img loading=\"lazy\" decoding=\"async\" width=\"10\" height=\"10\" src=\"http://localhost:8889/wp-content/uploads/2026/10/07b41c67-c13f-4110-92c9-dd98e58cf1a7.png\" class=\"attachment-medium size-medium\" alt=\"\" style=\"width:100%;height:100%;max-width:10px;\" /></a></p>
"}, "featured_media": 0, "filename": "07b41c67-c13f-4110-92c9-dd98e58cf1a7.png", "filesize": 80, "guid": {"rendered": "http://localhost:8889/wp-content/uploads/2026/10/07b41c67-c13f-4110-92c9-dd98e58cf1a7.png"}, "id": 277, "link": "http://localhost:8889/?attachment_id=277", "media_details": {"file": "2026/10/07b41c67-c13f-4110-92c9-dd98e58cf1a7.png", "filesize": 80, "height": 10, "image_meta": {"alt": "", "aperture": "0", "camera": "", "caption": "", "copyright": "", "created_timestamp": "0", "credit": "", "focal_length": "0", "iso": "0", "keywords": [], "orientation": "0", "shutter_speed": "0", "title": ""}, "sizes": {}, "width": 10}, "media_type": "image", "meta": [], "mime_type": "image/png", "modified": "2026-10-13T21:36:14", "modified_gmt": "2026-10-13T21:36:14", "ping_status": "closed", "post": 276, "slug": "07b41c67-c13f-4110-92c9-dd98e58cf1a7", "source_url": "http://localhost:8889/wp-content/uploads/2026/10/07b41c67-c13f-4110-92c9-dd98e58cf1a7.png", "status": "inherit", "template": "", "title": {"rendered": "07b41c67-c13f-4110-92c9-dd98e58cf1a7"}, "type": "attachment"}]
    at /home/runner/work/gutenberg/gutenberg/test/e2e/specs/editor/various/single-file-placeholder-drop.spec.js:71:45

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