As a noob this is likely me, but I tried to start a community on another server and I can’t see the post (my other account used to make said community) made and set as english. Unless it’s just me being a noob, that can’t be good. A cursory look seems to confirm that I can’t see anything aside from “Undetermined”.
When I go to my profile on Firefox, there’s nothing to change. All settings (and profile) are changed from the Settings menu, and in there there is only “Undetermined” listed for languages. There’s no option (that I am able to find) to choose a different or additional language.