GeoIp with google translate

Hm, interesting use case. But I would advice against automatically translating the web page to the user’s origin country: if you are tourist in China and hit google.com, you have problems even getting out of chinese mode …

And AFAIK, Google already tries to be intelligent in which language they propose to translate the content into. This depends more on the browser’s setting than on the origin’s country, I think. But you can ask the developer of the plugin you mentioned what he would find useful. Because probably what you’re asking for wouldn’t work without modifying his plugin …