Thanks.
Although I still require the international localization. I don't require the British English locale as I don't want "colour" etc. :-p (Yuck!)
I simply needed "Aluminium" as it is the internationally used name for Aluminium, in the common American English.
"Aluminum" is mainly just for the North American region, which is what throws a spanner in the works... for some. :D
Now perhaps the North American English locale with "Aluminum" really should be called "en-021" if following IEC locale naming.
https://en.wikipedia.org/wiki/North_American_English
Now, I pretty much based my silly little argument on what I've read here (aluminum specialist company):
https://eagle-aluminum.com/what-is-the-difference-between-aluminum-and-aluminium/
Although there is some paradox related to this, as indicated at this site:
https://www.merriam-webster.com/words-at-play/aluminum-vs-aluminium
Names were tossed about...
In a different universe, we may very well call it Alumium or whatever, but what happened in our universe, it seems, is that some other person decided to call it Aluminium, so it ends with -ium, as already familiar alongside potassium and sodium, named by that same person, so here we are...
So, anyway, it seems, that...
First, the American Chemical Society (ACS) officially adopted aluminum in 1925, but some time later, things changed a bit...
The International Union of Pure and Applied Chemistry (IUPAC) accepted aluminium as the international scientific standard in 1990.
So I suppose elders want to keep using "Aluminum" but those who want to follow the latest standard may say "Aluminium". :P
Therefore, both spellings are still accepted. That could change in the future?
At the end of the day, it's a bit of an old-potato-argument between neighbors on what to call the proverbial fruit today...
I'm of course rooting for Aluminium, given these two choices, although I'd prefer Alumium, however...