The extension (used by third parties) should not contain Wikimedia-specific messaging or URLs. When Wikimedia-specific messages are needed, they should be overridden in WikimediaMessages.
Examples of messages that need to be updated were added in rECAU09899479c45a: Introduce Vanish Request Flow (merged without addressing the issue).
| Status | Subtype | Assigned | Task | ||
|---|---|---|---|---|---|
| Open | None | T388026 MediaWiki and non-Wikimedia-specific-extensions should not unconditionally link to WMF projects | |||
| Open | None | T370385 Rewrite Wikimedia-specific account vanishing messages to be applicable to any wiki farm |
Note the vanish feature also use Wikibase to get the block appeal link, where third wikis may only need to configure a URL, or nothing at all.
I'm not really convinced that this should be done. CentralAuth is an extension specific to Wikimedia wikis, and we shouldn't make it harder to use on Wikimedia wikis. For other wiki farms, someone should probably split off (or copy) this functionality to another extension (see T359116), with any changes necessary to make it more generic.