[Mandatum]

But surely there are tools to remap X-language physical keyboard codes to the US layout?

Here's diagrams of the mappings.

https://www.terena.org/activities/multiling/ml-mua/test/kbd-...

And here's usbkbd (note scancodes at the top):

http://lxr.free-electrons.com/source/drivers/hid/usbhid/usbk...

Explanation on scancodes, which map to which keys for different physical boards: http://www.quadibloc.com/comp/scan.htm

[Someone1234]

I suppose you could use something like autohotkey to do that, but it would require intercepting and generating new key presses for every altered key on the keyboard, and could theoretically cause input-swaps if one keypress took longer than a subsequent keypress (e.g. due to a context switch).