First export from translatewiki.net with https://gerrit.wikimedia.org/r/c/mediawiki/core/+/1047378
- Verify autonym correctness in language-data
- Add to Wikifunctions's language list in function-schemata (done long ago)
- Add to includes/languages/data/Names.php (patch)
- Add to RELEASE-NOTES (patch)
- Set fallback if needed (asked)
- Add namespace translations
- Check that namespace translations don't conflict with language codes
- 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