How do you figure? Is Quebec a colonial nation or annexed to British Canada after the 7 years war in eu4?
In the game, Quebec would be annexed by Britain's colonial nation (Canada). However, since that happened in the late 18th century, French Canada wouldn't even begin to change to Canadian (or whatever) culture until around the end of the game. You could even add additional time to account for separatism disabling the MTTH timer so cases where CNs annexed directly rather than through the annexation of the overlord means there is a period of integration.
The main goal here, though, would be to make cultures in the New World more reasonable. Not an extreme hodgepodge of old world cultures in the new world (such as in the example image a couple of posts above). Instead of "Francian culture" or "English culture" or "Castillian culture" mixed in with various other old world cultures that were either former CNs or exported minorities it would be "French Canadian" or "American" or "Mexican" throughout the whole CN (dependent on the colonial region and overlord country).
It's not a perfect model, but I think it would be an improvement over what is currently represented in the game.
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