A common theme weaves through our report: many apps and websites are not available in the thousands of languages people around the world speak everyday. As a consequence, every day billions of people around the world are affected by a kind of language exclusion. And yet among technology experts there is often little awareness about the pervasiveness of the problem. This in part reflects that all of us only see a tiny part of the picture: there currently are no publicly available surveys that can give us a basic impression of the scale of such language exclusion among the most widely used digital platforms. To address this knowledge gap we present a first platform survey that collects and analyses the interface languages — mainly in written text forms — supported by major digital platforms in an attempt to improve our collective understanding of online language inclusion and exclusion.