I really like the idea of two cultures the more I think about it. The first could be like a primary culture and the second a secondary culture, and the two cultures could be inherited differently to represent shifts in culture.
For example, the primary culture could be 50% father's primary, 40% mother's primary, and 10% capital province's primary, and secondary culture could be like 35% mother's primary, 35% capital province's primary, 10% father's primary, 10% father's secondary, 10% mother's secondary. This way the primary culture should stick with the ruling family to some degree but the secondary will be more volatile.
The other good idea I saw was where a person was a % based in culture, but this would only work if after a few generations a culture was eliminated, otherwise after like 200 years all the rulers would be close to an even split on all cultures. But having each character have a % based culture with some being inhereted from each parent and the region as well as court members would be a great system too.
For example, the primary culture could be 50% father's primary, 40% mother's primary, and 10% capital province's primary, and secondary culture could be like 35% mother's primary, 35% capital province's primary, 10% father's primary, 10% father's secondary, 10% mother's secondary. This way the primary culture should stick with the ruling family to some degree but the secondary will be more volatile.
The other good idea I saw was where a person was a % based in culture, but this would only work if after a few generations a culture was eliminated, otherwise after like 200 years all the rulers would be close to an even split on all cultures. But having each character have a % based culture with some being inhereted from each parent and the region as well as court members would be a great system too.