Indeed, beautiful game,
But I have a couple more 'typo's' and inconsistencies
The Dutch Region of Emmeloord. Emmeloord didn't exist in 1914, wasn't build until after that land fell dry in 1942. nl.wikipedia.org/wiki/Noordoostpolder (sorry it's in Dutch).
The Dutch Region of Texel. Texel is actually an island off the coast of the province of 'Noord-Holland'. Therefor it would be far more accurate to rename this region to 'Noord-Holland'.
The Dutch Region of Wolle. Wolle??? Errrr.... Huh?

I guess you mean Zwolle. (so that is an actual typo). Location wise it is also not the best choice for this region. I would rename the 'Emmeloord' region to 'Zwolle' and the 'Wolle' Region to 'Amersfoort', which at the time was a city that held a garrison.
The Dutch Region of 'Hengeh'??? Let's change that to 'Hengelo'

Finally.. The Dutch Region of Koevorden. Should be written with a C instead of a K 'Coevorden'.
Now.... I know Holland was neutral in WWI so, in the grand scheme of things it might seem trivial, but still

Again though... Great game!!
Cheers,
Erik