Canada has never been bilingual except to those enclosed in the Toronto-Quebec bubble.
When Europeans arrived, there were a thousand indigenous languages here, with two stretching from coast to coast: Cree of the boreal forest and Inuktitut of the arctic. Both still do.
Until the 1st war, the commonest nationalities on the prairies were Finnish, German and French, while Cantonese formed a major part of Vancouver.
The Niagara farming community I grew up in was multilingual: English and every eastern European language there was, spoken by refugees from Stalin.
Ottawa's Chinatown is now populated mostly by Vietnamese who fled the Kmer Rouge. A restaurant I recently visited there was tri-lingual: Vietnamese, Cantonese and English.
Today, 20% of Canadians speak a language other than English or French at home. Mandarin Chinese is the most common in such homes.