My guess at that time is that it was an instance setting or something. That instances have a list of languages it supports. It makes sense given the admins have to be able to read and understand the posts in order to do their job responding to reports and whatnot.

But then again this was mid-June, there’s a lot of things happening, and I didn’t really explore the issue further, hoping that it’d be fixed eventually (once the more urgent issues got addressed).

I actually set-up my account to have a shortlist of languages to use (English, my native language, and a few languages I dabble on).

Come to think of it, I only see the language setting in the desktop/web interface. The mobile app that I am using doesn’t have it.