I guess I'm too old and assume everyone knows how to touch type...

I know how to touch-type. I don't know how to place my fingers on a keyboard I can't see.

Do your keyboards not have small bumps on F and J key to help you find the correct positioning when you can't see the labels: https://www.industrytap.com/know-bump-f-j-keys-keyboard/3546...? Maybe this is only on US keyboards?

Yeah, they have the bumps, but if I can't see the keys, I imagine I'd still have to feel around to find the bumps.

I don't actually know though--as I said, I've never tried it. My keyboard backlight is off now, trying it tonight.

The results are in, it's actually not a problem to find the keys in the dark even without backlighting. Good to know!

Old Apple keyboards used to have the bumps on D and K, but I don't think I've ever seen a keyboard without any bumps at all. It's definitely not a US only thing.

Some keyboards (stupid/fancy ones) may not have it, but regardless of layout.