@Monika64 I would trust the email addresses mentioned in the help article. What people have to look out for are what I call mutant email addresses such as @airbnbrentals.com which is completely phony. As the article says, these emails should also show in a host's dashboard or message inbox under Notifications.
While I've never had the need to have anything translated on my listing, it would not surprise me if Airbnb translated some listing details. I've seen many listings with translated information, usually English, French, Portuguese and Spanish.