Top of the Italian2.php file in the lang folder reads:
Quote<?php
// ------------------------------------------------------------------------- //
// Coppermine Photo Gallery 1.3.4 //
Wrong file or typo?
Dennis
a lot of language files in the lang folder have cpg1.3.x as in the file header. The reason is quite simple: those files actually are files from the stable branch. So far, nobody has contributed a language file for cpg1.4.x, that's why the older version language file is there, using the new language fallback feature. That's fine. Marking as "invalid".