All words are made up and language isn't real

Then we also need to talk about Sodum, Potassum, Magnesum, Plutonum, Uranum, Cadmum, Chromum, Titanum and a bunch more. Why should Aluminum be the outlier?

The actual aluminium that people work with in actual real life are also alloys.

Guy that named it called it Aluminum

Weirdo types that decided they were in charge of naming things decided to name it Aluminium so it "matched" the likes of other metals like titanium, iridium, etc

unless you need to block the allomancy

Not as bad as those osmium-heads, plus we've got sparkle and color!

I'm not the person you're replying to, but actually, I didn't know that; I just went and read up the history of the word and it's pretty interesting (for a nerd like me), so thank you for highlighting this. I admit, it used to confuse/irk me to hear Americans pronouncing aluminium like aluminum, so it pleases me to realise that I was wrong and that Americans are actually just pronouncing aluminum like aluminum.

I think I didn't realise this in part because apparently aluminium is generally used in American scientific writing. This is interesting to me because many journals style guidelines demand American spellings of words (My mind blanks of specific examples right now, but I often have to replace s with z when Americanising my writing). I don't know why, but I find it neat to imagine a kinship with a hypothetical American scholar who curses as they "correct" aluminum to aluminium before submitting their paper.

Edit: I can't believe I literally wrote an example of a word with the relevant s/z thing and didn't notice. Americanise/Americanize

You... aluminum-loving sonofabitch.