In the past I've used the Google page translation code: https://translate.google.com/manager/website/?hl=yi

It works pretty good. There's no way to tell if it's 100% accurate, but its nice to offer the feature to your visitors. However, I ended up removing it because I just didn't have any room for it anywhere on the website anymore, as it is pretty much on a page-by-page basis, and the majority of my visitors are English-speaking anyway.