For release group https://musicbrainz.org/release-group/f1e0433f-ad4f-4503-ab2a-e6bc41e77976
I see the inline Wikipedia in Russian (with link to https://ru.wikipedia.org/wiki/The_Hits_of_Baccara), even if the only Wiki-link on this release is to the English site (https://en.wikipedia.org/wiki/The_Hits_Of_Baccara) and I use English as language for the web frontend.
It appears on Firefox and also on SRWare Iron (Chrome), on Windows (German).
I guess, this happens, because there is an alias (Russian "Artist name") defined for the artist. For me this alias is okay and should not affect the inline Wikipedia abstract.
I would expect so see the English site of Wikipedia.