New and Changed Civilizations in 1.18

[HNation]

I appreciate your work, but I don't think that adding ending -u for East Slavic cities works for your goal. In pronunciation, it vanished before differentiation of russian, ukrainian and belarusian, though I don't remember when you planned to introduce Muscovy civilization. In writing, it remained literally until bolsheviks, so making it distinct feature of Kievan Rus in oppose to modern Russia just looks weird.

It apparently vanished around the time of the Mongol invasion of the Kievan Rus, so it would work perfectly for the time frame of the Kievan Rus in the mod.