I would disable posting as “Undetermined” in the communities I moderate but the Lemmy platform is a bit lacking in that regard, as the UI used for posting or commenting will not limit the dropdown to the allowed languages, and the community sidebar doesn’t expose the info either so people would have to guess. And it would be nice if there were some basic language detection support and recommend a language when typing something.

It’s too bad though, I’d like to avoid using undetermined so that people can actually filter posts and comments using languages they don’t understand. One day maybe.