Duolingo is the most popular way to learn languages in the world. Best of all, it's 100% free!

https://www.duolingo.com/RalphSherwin

mobile use

Whenever I complete any task on my mobile app for duolingo it does not register as having been done - it keeps the next section locked and invites me to it do again! Can you sort this out please!

4 years ago

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