Indeed, years ago now, I tried to brush up on my French which I had learned in school. Duolingo did not like my pronunciation (probably fair), and kept me stuck

Indeed, years ago now, I tried to brush up on my French which I had learned in school. Duolingo did not like my pronunciation (probably fair), and kept me stuck on very basic French that I knew well rather than actually getting to the point where it was challenging me and helping me improve. There may also have been an element of Canadian pronunciation versus France pronunciation. Anyway, it was annoying, and I quickly gave up. Also, there was at least one time where it would not accept my correct answer and insisted on a (IMHO) worse answer.