Raising And Shift
Finally, let’s take a look at a Canadian linguistic phenomenon called Canadian Raising and Canadian Shift. Canada’s York University says raising is “a phonological process characteristic of one variety of Canadian English", where the beginning of the diphthongs /ay/ and /aw/ raise to mid vowels when they come before the sounds /p/, /t/, /k/, /s/, and /f/.
And a shift, meanwhile, is “a change or system of parallel changes that affects the soundstructure of a language, as the series of related changes in the English vowel system from Middle English to Modern English.” Or of course, the vowel shifts that bring us the glory of Canadian (and American) accented English. Got that, eh?