I don’t really know how languages work in the feddiverse but I’ve heard that not setting the post langauge at all can result in your post being hidden from most users. So I always set my posts’ language to English. I find it a little silly that I have to scroll through a giant list of all possible languages to find mine. I have configured the language on my account so t should default to that. Or at least it should be at the top of the list.