fu_chat_lang
Allow user to switch TLK to a different language.
Given TLK in the form of “<name>_en”, “<name>_fr”, etc. The following unit will allow a user to switch to the TLK of his choice with the chat command “/lang”.
If the given TLK does not exist, then an error will be printed.
On user client connection, this unit will try to set the correct TLK.