I dont think that the duolingo levels could be mapped to CEFR levels. After all you could gain points and respective levels at duolingo while repeating the same lessons over and over again or while translating very easy sentences only. Having mastered the skill tree to a certain degree could however indicate very roughly a CEFR level. I am far from being through the learning so I cannot tell. But I guess that it could be something between A2 and B1?

It would be interesting to hear from duolingo or a proficient speaker on this topic to get a better sense.

Also interested in the answer. :) I am currently on Level 12, but have been at B2 for over a year... (No real opportunity to get to C1 except for a month ago.) There is only new vocab; the grammar is at the same level. Any ideas for CEFR levels across the board?

Just trying to 'bump' this as I'd like to know the answer to this question too

Yeah, also would like to know the answer.... anyone?

I also really really want to know the answer to this......

bump x2