Download the language → Extract into the
languages/ directory of your forum install
config/config.php → Change the line:
$config["language"] => "name_of_language",
The casual language pack is the forum's default. It contains a few quips here and there!
Can be changed over to "professional" in the installer.
On the other hand, the professional language pack provides standard English responses for your forum. It is aimed towards a work environment in which this forum software would be a great alternative to email!