First export from translatewiki.net with https://gerrit.wikimedia.org/r/c/mediawiki/core/+/1189039
[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/+/1215664|patch]])
[X] Add to RELEASE-NOTES
[ ] Add namespace translations ([[https://incubator.wikimedia.org/wiki/Talk:Wp/ppl/Achtu_Iswat#Namespace_translations|asked]])
-- [ ] 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/AssistantLanguageSettings.php`
[ ] Test language search in UniversalLanguageSelector and fix the search index (if needed)