I'm not sure if this issue has ever been risen before but, is it possible that this special resources (the ones which set the limit for your MIC level) carry a cultural penalty with them?

I'm currently playing with Arche Seleukeia and I just conquered Nisa, however the resource "Subjugation Only" has a "(Eastern)" tag after it, which implies, I believe, that there's a cultural incompatibility between my current culture and theirs, am I right?

Another issue I've is with my original cities, the ones I owe without conquering, like Babylon, Arbeia or Karkatiokherka (spelling), they also have cultural penalties even though they're fully converted to my culture from the begining, I assume that this is because of the wonders this settlements posses. But if this is true isn't it a little bit exagerated (the cultural penalty given by the wonder), for example the Persian Royal Road passes through Karkatiokherka and just for that it suffers about % 20 cultural penalty.

Anyway, just to save you guys some time I'll only like to know if this moddable in any way. Am I assuming right that the culture of a certain edifice is determined by a string in that file "export_descr_buildings.txt" and that, therefore, the actual cultural penalty pertaining to each building is hardcoded?

Thanks.