https://fr.airbnb.ca/rooms/4539100 is working okay for me to see your listing in French, @Tagny0.
There was no difference in a no-dates search in French or English, and it shouldn't make a difference, since no matter the language or extension (.ca, .com, .co.uk) every listing should be findable, but I did notice that I could not find you in either language in La Conception, QC, but you are number 3 when I search La Conception, Québec, in both languages.
I wonder if the English speakers are choosing Québec and the French speakers are choosing QC when they search.
Sorry, I can think of no suggestions that might help you get more French speakers.