You don't know whether the mod understands the language you're using, so don't ask us to explain something that's probably not true.

My guess is he either does understand it, uses a translator, or knows someone he trusts who speaks the language. Almost certainly he had some way of knowing those posts needed to be deleted.

But we're wasting our time here. If you're really interested then PM Cyrus (who is the only moderator of that section) and ask him.