You sound like people who hear about evolution and they ask "so where are the monkeys turning into humans." They are not saying there is culture tied to speaking English, they are saying that speaking English is part of some cultures and therfore by learning English you are participating in those cultures. French is the same. I'd you let French die off, you are letting part of French cute die off. If you learn French, you are choosing to inmerse yourself in French culture.

The guy said "intertwined" and it's a great way if thinking of it. You don't learn French and then French culture, learning a language is taking part of a culture, in this case Quebecoise, not even French.