I have a bit of troubles when I get the hearing test to see If I understand, but I can only translate when it's written down.
I would recommend watching some YouTube videos in French with captions on (in French, no English!) and maybe some music videos to help you understand. Is that what you’re saying is you personally cannot understand the language or is a problem with Duolingo?
Give yourself a little time... and use the turtle. Rebekah also has an excellent suggestion.
I RECOMMEND LISTENING IT ON YOUTUBE TO SEE HOW THEY ARE PRONUNCED!