First export from translatewiki with https://gerrit.wikimedia.org/r/c/mediawiki/core/+/1056790
[v] Verify autonym correctness in language-data
[ ] Add to Wikifunctions's language list in function-schemata
[v] Add to `includes/languages/data/Names.php` ([[ https://gerrit.wikimedia.org/r/c/mediawiki/core/+/1057006 | patch ]])
[v] Add to RELEASE-NOTES ([[ https://gerrit.wikimedia.org/r/c/mediawiki/core/+/1057006 | patch ]])
[v] Add namespace translations ([[ https://translatewiki.net/w/i.php?title=User_talk:Suitcaseshoes&oldid=12545248#Namespaces | contributed translations ]], [[ https://gerrit.wikimedia.org/r/c/mediawiki/core/+/1057217 | patch ]])
-- [v] Check that namespace translations don't conflict with language codes
[v] Add $linkTrail ([[ https://gerrit.wikimedia.org/r/c/mediawiki/core/+/1057006 | patch ]])
[v] Remove from translatewiki after deploying the core change ([[ https://gerrit.wikimedia.org/r/c/translatewiki/+/1057218 | patch ]])
-- [v] `mw-config/LanguageSettings.php`
[ ] Test language search in UniversalLanguageSelector and fix the search index ([[ https://gerrit.wikimedia.org/r/1057006 | cldr patch ]] to ensure findability by "Saint Lucia"; [[ https://gerrit.wikimedia.org/r/c/mediawiki/extensions/UniversalLanguageSelector/+/1066862 | ULS search index patch ]])