Steps to reproduce: change the UI language to e.g. French. Then open one of the example pages below (you may have to refresh a few times) and observe one of the failures noted in parentheses after the URL.

https://musicbrainz.org/area/8a754a16-0027-3a29-b6d7-2b40ea0481ed (tag editor in sidebar is missing)

https://musicbrainz.org/area/8a754a16-0027-3a29-b6d7-2b40ea0481ed/places (places map is missing)

https://musicbrainz.org/recording/5f4f78e0-148f-43e6-9e3a-f0af43312efe/fingerprints (fingerprints table is missing)

(This is probably not a complete list of the types of pages where failures can occur.)