Here's another source from The Guardian (not my favorite paper, but generally publishes true things): https://www.theguardian.com/world/2015/jun/02/canada-indigen... - "Children inducted into residential schools were forbidden from speaking their native languages and subjected to routine physical abuse, inadequate nutrition and neglect. Sexual abuse was common, according to the survivors who testified at commission hearings throughout the country."
Edit: The history of missionaries is inextricably linked with the history of Western imperialism and exploitation. These accounts are by no means limited to the Canada or even the Americas - there are many accounts of the brutal treatment of indigenous people in Africa, Australia and Oceania committed by missionaries.
Here's the top link I found when googling 'first nations canada banned language': https://www.facinghistory.org/stolen-lives-indigenous-people...
Here's another source from The Guardian (not my favorite paper, but generally publishes true things): https://www.theguardian.com/world/2015/jun/02/canada-indigen... - "Children inducted into residential schools were forbidden from speaking their native languages and subjected to routine physical abuse, inadequate nutrition and neglect. Sexual abuse was common, according to the survivors who testified at commission hearings throughout the country."
Edit: The history of missionaries is inextricably linked with the history of Western imperialism and exploitation. These accounts are by no means limited to the Canada or even the Americas - there are many accounts of the brutal treatment of indigenous people in Africa, Australia and Oceania committed by missionaries.