We've built an Entrypoint Registry that extensions can use to register entrypoints in ULS: https://www.mediawiki.org/wiki/User:APatro_(WMF)/UniversalLanguageSelector/EntrypointRegistry

The missing languages entrypoint can be tested on

Testing on https://bd4346ecd8.catalyst.wmcloud.org/w/index.php?title=Special%3ATranslate&group=page-ManyLanguages&action=page&filter=

Thanks for the QA report!

Testing this on French Wikipedia:

Moving this to in progress to add some QA instructions and post some screenshots.

We've incorporated all the inputs from the security review and released a new version of the language data library. See: https://github.com/wikimedia/language-data/releases/tag/1.1.10

We've incorporated all the inputs from the security review and released a new version of the language data library. See: https://github.com/wikimedia/language-data/releases/tag/1.1.10

We've incorporated all the inputs from the security review and released a new version of the language data library. See: https://github.com/wikimedia/language-data/releases/tag/1.1.10

Can be tested on patch demo https://2256d7c2c9.catalyst.wmcloud.org/w/index.php?title=Special%3ATranslate&group=page-TranslatablePage&action=page&filter=&action_source=translate_page&language=en when logged in as Patch Demo user.

Issue appears to be fixed.

Work for two entry-points is also being handled as part of this task:

Here's how suggested languages are currently displayed:

@Mstyles Thanks for your review.

In T410137#11727185, @Nikerabbit wrote:

The latest release is not visible in https://www.mediawiki.org/wiki/MediaWiki_Language_Extension_Bundle

Created: https://phabricator.wikimedia.org/T419546 to track addition of custom regions.

@Pginer-WMF The description in https://phabricator.wikimedia.org/T253303 says,

Comment from @Nikerabbit on the patch,

In T287877#11616321, @abi_ wrote:

The current ULS uses the following logic

/**
 * Get a list of codes for languages to show in
 * the "Common languages" section of the ULS.
 * The list consists of the user's current selected language,
 * the wiki's content language, the browser' UI language
 * and Accept-Language, user's previous selected languages
 * and finally, the languages of countryCode taken from the CLDR,
 * taken by default from the user's geolocation.
 *
 * @param {string} [countryCode] Uppercase country code.
 * @return {Array} List of language codes without duplicates.
 */
mw.uls.getFrequentLanguageList = function ( countryCode ) {
	const ret = [],
		lists = [
			[
				mw.config.get( 'wgUserLanguage' ),
				mw.config.get( 'wgContentLanguage' ),
				mw.uls.getBrowserLanguage()
			],
			mw.uls.getPreviousLanguages(),
			mw.uls.getAcceptLanguageList()
		];

	countryCode = countryCode || mw.uls.getCountryCode();
	if ( countryCode ) {
		lists.push( $.uls.data.getLanguagesInTerritory( countryCode ) );
	}
        ....
}

Here's the latest screenshot from the beta features:

I've updated the beta feature description

A few screenshots from my local machine.