I installed FreePBX 2.3.1 with Asterisk 1.4.13 and I accessed to the admin section of FreePBX.
If I try to change the language of FreePBX nothing happens, and the language is ever English even if I selected “Italiano” or another language other than English.
Please post this in the bug tracker (Development site/Report a Bug). Messages posted here might get read and might not based on the amount of available time a developer has on his/her hands at the time. Postings in the bug tracker will get logged and have to be reviewed.