Localizing WP1.5

I implemented WP1.5 with a theme based on Kubrick i modified myself. I put the ol italian localization file but i noticed that alot of words are not transalted.

WHne there will be a source file (maybe there is it already) to translate it? I would need the souce file for talian too to avoid to translate again text that already existed in 1.2

Thanks all