French law permits such things as prosecution of libel of dead people which English law does not. There is really no concept like free expression in the English law sense (and most certainly not in the US constitutional sense).
I doubt this case would have played out the same way in any other province. No other province operates enforcement units to trap businesses using English in order to fine them for not using French or having French words smaller than English ones. (for a recap of that nonsense, start with http://world.time.com/2013/04/08/quebecs-war-on-english-lang...)