70
[KDE] Linux Vista ultimate (TM)
(feddit.it)
Submit screenshots of all your *NIX desktops, themes, and nifty configurations, or submit anything else that will make themers happy. Maybe a server running on an Amiga, or a Thinkpad signed by Bjarne Stroustrup? Show the world how pretty your computer can be!
It's Italian actually
Or Portuguese
With the info on your screenshot it could be several romance languages. I just chose Spanish because that's my second mother tongue and because it's the option with the most speakers worldwide (therefore highest chance of guessing correctly).