Someone created a [Brazilian chat room in Ask Ubuntu][1]. When questioned about the language, the room owner advised me to use pt-br for in-room conversations.

Is it OK to create a chat room for users of a certain language and have that language used for chat on that specific room? In case it's OK, what if there are two variants of the same language, as it is the case with pt (Portugal) and pt-br (Brazil)?


  [1]: http://chat.stackexchange.com/rooms/9267/brazilian-users-of-ask-ubuntu