North American English is the collective term for the varieties of English spoken in the United States and Canada. Because of their related histories and cultures, plus the similarities between the pronunciations (accents), vocabulary, and grammar of American English and Canadian English, linguists often group the two together. Canadian English uses both British and American spellings; however, certain words always take British spellings (e.g., cheque rather than check) and others American spellings (e.g., tire rather than tyre).
References
↑Chambers, J.K. (1998). "Canadian English: 250 Years in the Making". The Canadian Oxford Dictionary (2nded.). p.xi.