Date: 09/27/07 (Opera Browser)    Keywords: google

I had an idea that the context (right-click) menu used to have some translation options, but I could be wrong. Anyway, here's someone's post on how to put some there:
http://my.opera.com/Tamil/blog/google-babelfish-translation

Source: http://community.livejournal.com/opera_browser/67336.html