This has to do with one artist in specific.

https://musicbrainz.org/artist/5936bba1-c493-4d3a-bbe1-305c86d0daf5

I speak/read/write both English and German. I noticed that her Wikipedia information when I have the "English Language" selected is in an oriental language (sorry I don't speak any but recognize regionally where they are from). Even the link to continue reading it at Wikipedia takes me to the wrong language when English is selected

Switch to Deutsch and it is fine.

Switch to "Nederlands" and there again it is also fine (I can get by there).

I've checked this with a few other artists and they all seem to be working the way I would expect them to work i.e. display the information in the selected language, click continue reading and be directed to for that page at Wikipedia displaying the content in the language selected within MusicBanz website