Microsoft sucks at localization. They’ve screwed this up for years, not bothering to learn the difference between US, UK, and Canadian standards. I just tried OnlyOffice recently via their free desktop editors, and they do Canadian spelling properly. That is, the UK spellings of “colour” and “favourite” with a ‘u’, but using the US-styled versions of words ending in ‘ization’ with a ‘z’ instead of the UK spelling with an ‘s’. Canada isn’t just set on a default British standard. And we don’t use metric A4 paper either!