In its announcement post, the Translate team has also explained how it adds new selections. For a language to be added, it has to be written and it has to have a considerable amount of translations found online. Google scans those texts and uses machine learning to identify patterns. Even the big G's powerful machines need a human touch, though: the Translate app/service also relies on input from volunteers who translate terms and check other people's. It's been almost 10 years since Google launched the service with but a handful of options. Since then, it has expanded tremendously and (lonely hearts, take note) brought at least one couple from two different countries together.