[to3m]

Yes, the key is the same on English keyboards too. I've no idea about USB keyboards, but on AT keyboards that key actually generates two separate scan codes depending on whether it's pressed without alt (PrtSc) or with (SysRq). So in a sense SysRq is genuinely a separate key, that just shares its button with another.

(I don't remember what happens to the Alt key press when you use it to invoke SysRq - I suppose it just appears as normal and so the Alt+SysRq combination sort of doesn't exist.)

Interestingly the SysRq scan code is far easier to detect - there's just one value to watch for rather than (as with PrtSc) a whole sequence of them. Probably a legacy of its having its own key on older keyboards.