First export with https://gerrit.wikimedia.org/r/1053836
- Verify autonym correctness in language-data
- Add to includes/languages/data/Names.php (patch)
- Add to RELEASE-NOTES (patch)
- Set fallback if needed
- In core (languages/messages/Messages*.php)
- In jquery.i18n (src/jquery.i18n.fallbacks.js) (pull request)
- Add namespace translations
- Check that namespace translations don't conflict with language codes
- Add $linkTrail
- Add date formats (if needed)
- Add digit conversion (if needed)
- Define wider line-height in resources/src/mediawiki.skinning/i18n-headings.less (if needed)
- Remove the language from Wikibase and WikibaseLexeme if needed
- Remove from translatewiki after deploying the core change (patch)
- mw-config/LanguageSettings.php
- mw-config/FallbackSettings.php
- Test language search in UniversalLanguageSelector and fix the search index if needed