I haven't used duolingo in years. When I logged in, it immediately started a lesson for a language that I learned through other means. But I couldn't cancel the lesson. I had to go through it. When I tried to cancel it would log me out of the app. It was so stupid I almost Uninstaller the app right there. The help page on the website also doesn't show how to remove a language from the android app. So far in 10 minutes having it reinstalled on my device, it's been exceptionally frustrating