I learned 1875 new Spanish words and the app tells me I finished the course!
This post is deleted!
It works fine now.
It's a glitch, happened to me too in the French course.
I'm more inclined to think that there was a glitch in the app because it offered me the option to have a linguist graduate tag on here. The app wouldn't give me any new words (I had a few left before reaching my daily goal of 20 new words). Then I went to try to continue on the desktop version and it worked just fine.
If this is how they set it up based on your comment then I think it's weird to word it in such a way instead of just saying something along the lines of "congrats you now know enough words to..." which would be motivating to a learner instead of saying we're completed the course when we in fact have not.
It seems counterintuitive to tell users they're done and then stop giving new words which could discourage further app use. Also the challenges didn't work for me last night either so it's making me think that something was up with the app.