Software languge options - why does English always need a 'US' next to it?

[Chemical Alia]

Sometimes when I'm at an ATM, a Mexican flag pops up for the Spanish option, rather than the flag of Spain. And I doubt anyone is upset by this, despite Mexico not having invented the Spanish language.

Until that ATM software is exported to Spain. Then there would be some raised eyebrows...

Still doubt it. Most likely they'd go, "oh, must be from North America" and move on.