Wait, a duke has trouble coming up with 50 gold to fix his own typo for his duchy's name?
Iashalur's got a GDP of only about 1500 gold, and I just had to rename three duchies. I actually didn't have any typos but I can see that as another waste of gold for people.
Can't there just be moral penalties like when you rename a unit? Its not as if there's a mechanical advantage to a new duchy name.