Steps to replicate the issue (include links if applicable):

• Go to Special:Watchlist on fawiki
• Notice the legends in the "list of abbreviations" box (see screenshot below)

What happens?:
The word "Wikidata" is shown in English

What should have happened instead?:
The localized version, "ویکی‌داده" should be shown.

Other information (browser name/version, screenshots, etc.):
The message that defines this is wikibase-rc-wikibase-edit-title and in ./client/i18n/fa.json it is defined as "ویرایش در {{WBREPONAME}}". On fa:MediaWiki:Wikibase-rc-wikibase-edit-title it does show in localized form. It is only in the Watchlist that it doesn't.

This bug smells like T395973 which was found to be a parser related issue and ultimately addressed by @cscott