In order to translate a language you must : <br />
1. Set the AT_DEVEL_TRANSLATE constant in /include/vitals.inc.php to '1' <br />
2. Make sure that you have added the new language to the database<br />
3. Select  the new language as the one you want to translate from the 'translate to:' option at the bottom of the page<br />
4. Use the translate button and translate the new language in a new window<br />