Originally Posted by Semi-Lobster
I know we don't want to talk about it and you probably discussed this earlier.... but why does Zeeland go Frisian, to Flemish, to German?
In 1066 the islands that then made up Zeeland were called the Frisian islands, and there lived free peasants and some small local lords. Of Frisian heritage.
During the 12th and 13th century, there were a lot of wars between Flanders and Holland about the area and at some point, Flanders held the upperhand there.
In the 14t century Holland got the upperhand in most of Zeeland, the region was divided in Zeeland East of the Scheldt (which is the north part

) and Zeeland west of the Scheldt (which is the south part

). Zeeland west of the Scheldt is part of Brugge in CK map.
Since Holland by then didn't have Frisian culture anymore (The Frisian culture lost more and more terrain in the middle ages) but a culture that would have the name Middle-Netherlands or Middle-Dutcht or Dietsch, take your pick. The Dietsch culture was a mix of frisian and low-frankish (low-frankish is a german culture) cultures (Flemish was a low-frankish culture to).
Since we don't have Low-frankish or Dietsch culture in the game, the only real option is German. Since Flemish was the name of the culture and language in Flanders. And it would be silly to have Flemish culture outside Flanders, it would be just as weird to give the scandinavian cultures the name Danish or all gaelic cultures the name Irish. Or all the south-slavic cultures the name Serbian.
Hopefully this has been the last time the subject has been brought up.
The current setup isn't ideal but that best that can be achieved with the tags we have.