Ok i dont want to be disrespectful since this is your mod and you will do it the way you like. I am just having a bit of a problem with these buttons. I get the point of them staying in a fashion with the GUI. The problem for me is that all the flags of the armies and the cities on the campaign and battle map actually dont have this culture specific look. It just doesnt look right when going into the diplomacy screen.

Sorry for being obnoxoius about this. Just wanted to post my opinion as a true fan of your mod. Now you can go ahead and shoot me.