What is the most famous Canadian historical event related to the French language?

The most famous Canadian historical event related to the French language is the Battle of the Plains of Abraham, which took place in 1759. This battle, fought during the Seven Years’ War, resulted in the British capturing Quebec City from the French. The battle is significant because it marked the beginning of British control over much of Canada. The event also had a lasting impact on the French-speaking population in Canada, as the French lost control of Canada but were allowed to maintain their language and cultural rights under British rule. The legacy of the battle is still felt today in the cultural and linguistic identity of Quebec.