Spanish iPod Translator
This might sound like some dodgy advertising pitch... but a while ago I downloaded a "Free Spanish iPod Translator" (from coolgorilla/lastminute.com). Although I haven't used it a lot, it has been useful when I have! :-P
They've got other language packs: German, French and Greek. So if you've got enough space left on your iPod, it's always a nice resource to have available... just in case you completely forget how to ask for the bill at the restaurant!