We currently have Sonate Nr. 3 für Violine und Klavier A-moll, op. 25 „dans le caractère populaire roumain“ in the database. The composer is Romanian, but studied and worked in France. Judging from the linked score as well as the French retained in the German title, he titled the piece in French. It looks a tad bit weird to have a random German title on his opus page.
So I'm not sure if those work names should be switched to French, and German left as an alias.
Asking for works to be added in their original language, though, would have a major downside—I'd be trying to add works in French, a language I do not even pretend to know. That'd lead to a lot of errors. I'm not sure why we have both a name and aliases—if we only had aliases, the whole problem goes away.