All our machines (Apple) know we use British English because we've told them in "Settings" that the language we use is English and the region we use it in is Europe.
Besides, my iPad wouldn't dare criticise my spelling, nor make 'helpful' suggestions. It obeys my commands. It's a machine.
... I thought my computer was set to UK. Me too, bellasnana plus I'm forever substituting an "s" for a "z". Trouble is, when you're getting on (like me) you start doubting yerself. So annoying.
Ive just tried those words on here and the English version is accepted - the US version gets underlined. I think it depends how your computer is set up. You can usually set your computer to use UK English rather than US English.
When I type (or should I say keyboard) information into the Gransnet box for posting a message, it "complains" by underlining for incorrect spelling whenever I use a double "L" e.g. for words like swivelling, spiralling, tunnelling etc. Am I going mad or did that used to be correct? As soon as I delete one "L" the sodding machine is happy again.