Whether to teach a child two languages at once is a question many parents in Quebec face. A new Concordia University study challenges myths about language mixing and weighs in on the psychology of early bilingualism. For breaking news, video, audio and in-depth coverage: https://www.cbc.ca/news Follow CBC News on TikTok: https://www.tiktok.com/@cbcnews Subscribe to CBC News on Snapchat: https://bit.ly/3leaWsr Download the CBC News app for iOS: http://apple.co/25mpsUz Download the CBC News app