First export with https://gerrit.wikimedia.org/r/c/mediawiki/core/+/1202565
[x] Verify autonym correctness in language-data
[x] Add to Wikifunctions's language list in function-schemata
[x] Add to `includes/languages/data/Names.php` ([[https://gerrit.wikimedia.org/r/c/mediawiki/core/+/1203564|patch]])
[x] Add to RELEASE-NOTES
[ ] Set fallback if needed
-- [ ] In core (`languages/messages/Messages*.php`)
-- [ ] In jquery.i18n (`src/jquery.i18n.fallbacks.js`)
-- [ ] Remove fallback gender aliases if needed
[ ] Add namespace translations
-- [ ] Add gender aliases if needed
-- [ ] Check that namespace translations don't conflict with language codes
[ ] Add an entry to LocalNames/LocalNamesEn.php in the CLDR extension (if needed)
[ ] Add $linkTrail
[ ] Remove from translatewiki after deploying the core change
-- [ ] `mw-config/LanguageSettings.php`
-- [ ] `mw-config/AssistantLanguageSetting.php`
[ ] Test language search in UniversalLanguageSelector and fix the search index (if needed)