BILLETS uses the native language file system for its respective Joomla! version, so modifying/installing languages will vary depending on your Joomla! version. Please refer to the appropriate instructions below. Thanks!

JOOMLA 1.5.X

• Download and install this free, fantastic language file manager: http://extensions.joomla.org/component/option,com_mtree/task,viewlink/link_id,1776/Itemid,35/ to manage language definitions in a simple, graphical manner, directly from the admin-side of your Joomla! installation 
• You can download the language definition packages from our free downloads section. 
• To install language packages, upload the files to their respective folders in your Joomla installation (the directory structure of the zipfile mirrors the directory structure of your Joomla installation) 

JOOMLA 1.0.X

• The language file system in Joomla! isn't as well built, so we've included our own language file manager for the 1.0.x versions of our components. 
• Go to BILLETS>>Languages to edit your language file(s). 
• You can download the language definition packages from our free downloads section. 
• To install language packages, unzip the downloaded zipfile to your hard drive. Then upload the PHP file to your Joomla installation via BILLETS>>Languages