Given that there are language subdomains, it would make sense for them to send users to RecentChanges filtered by language (for translation and so on); there's already the filtering by Translate, which would then be complete.
It's useful also for other filtering, and requires enhanced RecentChanges to be enabled locally (see also [[mw:Extension:CleanChanges]]), which is no big deal (see bug 35785).
Version: unspecified
Severity: enhancement