As many said, I'm, as a voter is Quebec in Canada, fully opposed to such extension of the law.
For the simple reason that learning English in a bilingual country should be mandatory until the end of HS years (current situation). Preventing people from learning English in Quebec will make the division between Quebec and English Canada greater that it is right now. English Canada has made a lot of efforts in the last years to improve its teaching of the French tongue. Voting this extension would make English Canada remove those classes as well in the long run. A huge step back, not forward.
I also find this to be one of the greatest insult you can do against the chart of rights and liberties that we have.
Learning a second language does not pose a risk to a culture... or should I say, what culture? (as a Quebecer)