In 2015 the interwiki links for the recent changes page were provided by Wikidata but that stopped working (or was never supposed to work like that?) and T102888 was reported.
As a work around, the interwikis were moved to MediaWiki:Recentchangestext but that also stopped working on the first week of August (this year) and reported as T172461
A comment in that Phabricator item indicates that, as a work around, the interwiki links can be moved to MediaWiki:Recentchanges-summary
Looks like that doesn't work un some wikis but might help in your case.
On Wed, Aug 23, 2017 at 3:01 PM, Nick Wilson (Quiddity) <email@example.com> wrote:
> Generally: it looks like this is an old bug (at least 2015), per
> https://phabricator.wikimedia.org/T102888 ("[Bug] Recent changes pages
> doesn't have anymore the interlingual wikilinks on the sidebar on some
> and connected tasks.
> Specifically: A newer bug, which might be why things have recently
> changed at zh-yue, is
> https://phabricator.wikimedia.org/T172461 ("Special:RecentChanges no
> longer displays interwiki links on wikis that have added them to
> On Wed, Aug 23, 2017 at 1:51 PM, Deryck Chan <firstname.lastname@example.org> wrote:
> > An editor on the Cantonese Wikipedia has noticed that Special:RecentChanges
> > has stopped displaying interwiki links. Is that a permanent, deliberate
> > change? And if so, is it possible for an individual editor to re-enable the
> > display of interwikis on such special pages?
> > On-wiki discussion here:
> > https://zh-yue.wikipedia.org/w/index.php?title=Wikipedia%3A%E5%9F%8E%E5%B8%82%E8%AB%96%E5%A3%87_%28%E6%8A%80%E8%A1%93%29&type=revision&diff=1115572&oldid=1115571
> > Deryck
> > [[User:Deryck Chan]]
> > Admin & ambassador for yue.wp
> > _______________________________________________
> > Wikitech-ambassadors mailing list
> > Wikitechemail@example.com
> > https://lists.wikimedia.org/mailman/listinfo/wikitech-ambassadors
> Nick Wilson (Quiddity)
> Community Liaison, Wikimedia Foundation
> Wikitech-ambassadors mailing list