I'm German and the German language contains Umlauts and the ß (it's like a s).
As I am an US-ANSI user only, I manage to get my Umlauts and ß with the US-Intl. layout via right Alt (AltGr) + q, p, y, and s.
Unfortunately, the Poker doesn't have a right Alt, nor can I dipswitch it. And pressing Ctrl+Alt+Shift+Q for a capital Ä is just too much a pain in the ass.
Otherwise, lovely thing, feels even better than my Filco.