FoxLingo is a Firefox add-on which provides all the language translation goodness that you deserve, you hard working surfer you. Not just the usual suspects either, like web page translation between 1000 language pairs, but also things like dictionaries, search and language learning. Preetty coool, yeais.
The Ultimate Language Tool! Web Page Translation, Translated Search, Auto Translation, Text Translation, Language Resources, Learning Languages, etc.
This is fantastic for browsing pages in other languages. I do note that the translation is a little (or a lot at time) off, but you can’t have everything.
Looks like it would be handy for learning another language by visiting foreign language sites.