I love my Mastodon client #pachli because sometimes it will randomly change my posting language to German (I don't speak German) and then warn me "Hey this doesn't look like German, are you sure you want to post this as German?" (I have never posted anything in German)
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@thePurpleMonkey What I think is happening there is:
1. Someone you follow posts something in English, but they marked it as German (maybe German is their default language, they forgot to change it, and they don't use Pachli to warn them).
2. You reply. Because the post is marked as German Pachli guesses you will initially reply in German, and sets the language to that.
3. When you post the language detection runs a final check, and then prompts you to change.
@thePurpleMonkey For example, you replied to https://mastodon.social/@Fabirucho/116099467833299795 by @Fabirucho.
That post is written in English, but if you tap it to view the thread, at the bottom of the post you'll see the author set the language to German.
@pachli Oh! That sounds like exactly what happened. Mystery solved! I really do like the feature that prompts you to change the language if it doesn't look like it matches what you wrote. Sometimes I post something in Spanish and I always forget to change it back. I just thought it was funny that it kept thinking I was posting in German (or Dutch, or Swedish)