The Keyboards are all QWERTZ unless stated otherwise. Since Digitec only sells from Stock u will have to order it from somewhere else or order an QWERTZ one here, buy an QWERTY Keyboard and replace the QWERTZ Keyboard.
Thanks for the quick response. It seems that keyboard swap-out on this machine is not an option, as it is all very well glued together (ifixit.com/Teardown/Microso...). I think it might just be easier to adapt to the CH layout... :-D