There was another Chrome extension that did what you're describing: https://chrome.google.com/webstore/detail/language-immersion-for-ch/bedbecnakfcpmkpddjfnfiho

There was another Chrome extension that did what you're describing: https://chrome.google.com/webstore/detail/language-immersion-for-ch/bedbecnakfcpmkpddjfnfihogkaggkhl/reviews https://chrome.google.com/webstore/detail/language-immersion... Was covered in Lifehacker here: http://lifehacker.com/5907432/language-immersion-for-chrome-teaches-you-a-new-language-while-you-browse-the-web http://lifehacker.com/5907432/language-immersion-for-chrome-... Seems like it's broken now though. I have a hunch he was trying to use Google Translate without paying for their API. Either that, or he really was paying for the API which is unsustainable for a free extension. I don't think it's a great idea anyway. If you want to learn French, you should read French written by a native speaker, not a machine translation of English into French. Readlang uses machine translation as an aid to understanding native texts, which is far more acceptable IMO.