Yes, there are examples when people speak the same language but belong to different cultures. However people who speak different languages always belong to different cultures. You picked up an excellent example yourself - North and South of Belgium...
A language does not define a culture, people should be allowed to communicate in any manor of their choosing.>>>>>>> You are completely wrong with this on: Language and only Language is what really defines Culture. Closer to the topic - efforts of Quebec people to protect the basis of their cultural heritage is understandable. However I have my doubts if this is the right way, it might backfire on local game-stores etc. I would recommend positive measures, which support French in Quebec.
>>However GPLv3 was crafted to address a very real problem, and judging from Microsoft's reaction, it is doing a great job in that regard.>> Excellent operation, Professor! Your techniques are magnificent! Professor, your intelligence... that's top level! We are so-ooo-o impressed... only, could we ask you, why did your patient die???
/in memoriam, to FOSS etc, 'saved' by GPLv3 and pinkies/commies/.