nah, it’s better for information integrity to reply in the language you understand imo, comments translated using translator services are very obvious anyway and some people are multilingual

Sure, I agree? Maybe there’s a misunderstanding here and I should add that it simply would never even occur to me to enter a conversation if I didn’t natively understand the language that’s being used.

I often reply under Japanese posts, and I always assume users will use a translator as I do, but maybe in the context of a Japanese this may look rude?

Can’t speak for others (obviously, as this is about individual etiquette perceptions) but I would consider it to be polite to only enter conversations with unknown parties in languages that the parties have shown to be capable of speaking and understanding.
Using a new language entering a conversation would therefore signal either familiarity (“I know they understand me”) or rudeness (“I don’t care if they understand me”) to me, I suppose.

How do you find out about it? Try to view the threads while logged out and not seeing your comments, I suppose?

What’s a bad upvote?