I've translated to portuguese and posted in SOpt.meta (and did a suggested edit in your post, adding the link). One suggestion: tell what languages will be used in the chat room. After entering the room we can see it's english (and it seems to be the "obvious" choice), but anyway, that could be in the post, just to make it more "official" and avoid anyone trying to use another language by mistake. — hkotsubo 2 hours ago