@animeirl @dogjaw @KitRedgrave I'm much more concerned about the Japanese instances. Look at @ nullkal@mstdn.jp's Atom feed, for example...there's a lot of misclassifications. If an admin there selects "show only Japanese" it doesn't seem like it'll end well.
There was a change pushed to master which strips URLs from the text-under-consideration and that *might* help, but not all of these have URLs in them.
Perhaps Mastodon can switch to a better language detector at some point. The Chrome library, for example, seems decent -- but it's a pain in the ass to extract.