And on a related note.... This "PRIVATEER_NATION" does sound interesting.
Might be useful for the non-player ship with flag of Malta that you sink in the Assassin storyline.
Or possible to make some towns on Hispaniola independent in the Napoleonic time period.
Rambling on even further: There is also support in the code for two "guest nations" in each time period.
At the moment we only have America in the last two periods, but it should therefore be possible to add more than we currently have.
But I suppose that might be better left until Build 15....
Still.... the possibility IS there, even if it might take a bit more doing.