I can't check all instances so I suppose that maybe possible but I've tried 4 and each one has been the same, but since you hadn't had this issue I suppose I can chalk it up to bad luck. Still needs fixing though, I'm not the only one who faced this and lemmy.world and lemm.ee both have this issue, 2 of the most popular instances according to fedidb.
It’s interesting because a lot of non-English speaking communities complain about users downvoting their content because they don’t understand it
From what I understand after reading that thread, a significant portion of users are downvoting just because they don't like seeing any other language than their preferred one(English?). But that's a stupid way of going about it, just message the posters to let them know about tagging it with it's proper language or just block the user. Pointlessly downvoting everything you see won't get the message accross.