All my French achievements are gone!
I was almost finished with my French (which I followed in German), when I added a new language course today (from English), and I'm shocked to find out that I can't see my French achievements anymore. I'm set back to total beginner. Hûh? I was at 50 % and I had 4 lessons left. What on earth happened? Did I do anything wrong?
Can I get it back?
It is not gone.
If you switch your base language (the language you are learning from), some of your existing language trees may "disappear" from your menu. Don't worry! They are still there. To visit them again, simply change your base language back to what it was originally. The skill trees displayed depend on what language you have selected as the base language.
More information is in the Duolingo Help Center "How can I learn multiple languages at the same time?"
I tried - I changed the base language, but I can't save it. The button stays grey, so I can't click on it.