Seriously, I'd just go for translations sucking. I know it's a subjective reason, but considering I found The Lord of the Rings excruciatingly boring when I first read it in French, and now adore it with fanboyish zeal, I have to say there's a reason for it.

I won't interfere further in a discussion between people who obviously know more on the subject than I do, but I should point out that the only Québecois series of fantasy that has been popular enough for me to hear about was Anne Robillard's Les Chevaliers d'Émeraude and I loathed that book. I can say with absolute confidence that I have deeper, more complex settings and characters in my Dungeons & Dragons campaigns than the first book of that series gave me (I never read further).

If that's the best we can come up with in the genre, I certainly understand why it isn't popular around here.