Curious, I clicked on a new email from Duolingo which introduced new languages, then clicked on "Swedish". I am now "frozen" in my Duolingo app - the screen says that Swedish is an unsupported language on mobile and invites me to try another language while I'm waiting. I'm not even on a mobile, I'm working on an IPad. There seems to be no way to get out of this screen and I can't continue with my French lessons. I've tried rebooting my computer, closing down and reopening the duolingo app etc but can't get rid of the "unsupported language" screen. Thanks for any suggestions as this is very frustrating!
You need to change the language on the web side. Switch back to French or Italian, restart the app, and it should work. Or, simply pick a language that is supported on the app, you should see all the options there.