I think you've done a good job with listing photos and the description, but maybe because it's in French it may be scaring people off? I took French and can translate the description enough so it makes sense to me but it might help to have the description in French then include an English version underneath, to appeal to those who may not speak French but still would like to purchase. Other than that, my only other tip is to maybe run some ads through Etsy just to get your stuff out there and in front of potential buyers.
