https://blog.duolingo.com/global-language-report-2020
Dec 15, 2020 · The 2020 Duolingo Language Report includes trends, patterns, and analyses about language learning around the world. Our data reflects the state of language learning for the most inclusive sample ever amassed: we have over 500 million learners in all 194 countries, Duolingo is free to use and is available as a mobile app and a website so learners from all backgrounds …