Actually, it's spelled aluminium in Britain and most other English speaking countries.Sir Humphrey, who named it, first spelled it 'aluminium'. Then he changed it to 'aluminum', but changed it back to 'aluminium' because that was what other British scientists preferred. In America, scientists agreed with the British, but the Noah Websters Dictionary of 1828 spelled it aluminum. That's how it came to be pronounced and spelled the way it is in th US.
-- found that on yahooo answers ^^
and found this on another
."Al-you-men-e-um". We pronounce it "uh-loom-a-num". They pronounce patriotic "Pat-tree-ot-ick". We pronounce it "pay-tree-ot-ick". We pronounce master flow valve "mas-ter-flow-valve". The Chinese pronouce it "mo-ass-fo-wowlve" What are some other differences in the way we pronounce things and others from lesser lands pronounce them?