I always set it (mobile client, Thunder), because I find it pretty annoying when I see posts in my feed that I don't understand (so it's only fair that I don't cause it to others)

Fortunately it hasn't been much of an issue on Lemmy, but Mastodon is pretty much unusable for me partly for this reason (last time I tried to curate my feed, ~50% of the posts I saw were in languages I cannot understand -- and I don't follow language-specific topics or people)

It seems it has now been "solved", with a popup for users posting from the website, reminding them to select a language: github.com/mastodon/mastodon/i… I think users (including me) will always make mistakes, and, as you note, not all clients support this setting, so I don't think relying on the UX of everyone's clients is a permanent solution 😕

In the meantime, the best I can do is set the tag manually when I'm posting 😔

Re-introduce automatic language detection for posts

Pitch Many users (even bots!) don't correctly set the language tag when posting. This can result in timelines containing very frequent unreadable posts for users not speaking the language, which is...

^{gkaklas (GitHub)}