I honestly don't know. I have quite little knowledge of Flanders during this period to be honest, the linguistics are the only area I thought I could give some help.
Originally Posted by Plumo
My two cents, I think it would've been well-known by most literate members of the court and society in general. I don't know if they would've also used it as the lingua franca there, or even as their first language in everyday communication. It certainly is true that nobles, along with the clergy, had more than twice as many non-Germanic (read Romance) names than the commoners, but this was still barely 6% of their group. It's quite likely that France in general had a large cultural and political influence over Flanders.
I'm Dutch, actually.
( I'm Flemish as well btw)
Sinte Jorijs Cruceboghescuttersgilde.
St. George's crossbowmen guild ( St. Joris scutters gilde)
Pavise crossbowmen. High upkeep. Limited amount. Well equiped, well armoured.
Bellfroy: medieval bell tower / municipality ( Belfort)
Replaces Town hall.
Already Middle Dutch!
Bellefoort or Balefroet.
Should replace the top market building in the market chain of vanilla medieval 2.
Requires wool. Produces cloth / linen / tapistry.
I made a list of some names of the period.
Here's a good source on the matter.