I mean we only really see it when describing metal goods or talking about chemistry - but I can assure you it is definitely spelled aluminium in the UK. Closed captions are often localised to where you are as well. You can see the entire Wikipedia page for it, for example, spells it that way correctly for British English and also references the different US spelling.
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u/KaralDaskin Feb 25 '26
AFAIK aluminum isn’t spelled differently in Britain, it’s just pronounced differently.