Actually, yes. Google and Facebook invests in translation significantly more than Microsoft in languages in Africa and Asia (to the point that you cannot set Windows do not have that language in question), for example, the various non-colonial languages in the African continent. In those countries, the computer is set to English/French because not of practicality but of significantly broken/no translation by Microsoft.

This doesn't explain why Google then also uses their crappy heuristics in countries whose languages are well supported by all major operating systems and browsers.

But my system language is English. Closest english speaking country is 2000+ km away.

And you know what? I didn't pay so much attention to what English I'm selecting so part of my devices are set to UK english and part to US english. It's all English to me, just don't translate my File menu!

Only thing is when suddenly “colour” and “centre” pops up in the menu that makes you double check what is actually meant

I tend to write british spelling, possibly because that's how they taught me in school. But I never notice the difference when reading.

I have to run into strong britishisms* like lad, tad, cuppa to remember there are differences across the pond.

* strong britishisms to me the non native speaker, at least.

Windows + Edge populates it for me. I consider it a form of tracking so I definitely will look into it how to override it, this hasn't happened yet tho.