How to change the default forum language

Choosing a Default Language from Language Settings

 * 1) Go to Admin > Configuration > Languages > Settings.
 * 2) Find "Default Forum Language" and select the language you want for your forum.
 * 3) Select the Save button.

Getting Different Languages for Your Forum -- Add Language

 * 1) Go to Admin > Configuration > Languages > Add Language.
 * 2) Type the name of a language into the input box.
 * 3) Select the search button.
 * 4) The page will be updated with a list of all matching language packs from simplemachines.org.
 * 5) Use the "Install" link to the far right of your desired language to install the language pack for your forum.

Language packs may also be found at Language Site Downloads.