I am using the english to hindi course, and I am stuck at the third lesson because there is a broken "matching question" where it asks me to match तु to "tu", but even after having gotten all other matches correct, I cannot pair the two up. I am stuck and cant move forward in the course. Does anyone know how I can bypass it?
Quite a few people seem to have this bug for the Letters lessons on the app and I believe a fix is still in the works. You can report the bug here with the screenshot.
Until its resolved, I think the only workaround is to clear the problematic lessons on the web version. You can also use duolingo.com on your phone's browser to clear them.