AoE2 DLC CIV Idea - Romanians (Cavalry and Archers civ)

So, how would their culture be different from that of China?

Okay, you are comparing the Croats who had a kingdom of their own with the Manchu who lived in tribes when the Chinese found them and shortly after incorporated them into China, their history is essentially the history of China and they have nothing to add from their own. For Croatia, Yugoslavia wasn’t a thing until 1920.

Okay, but I doubt Indian players will like that. As opposed to changing the Slavs to Rus.

Yes, because at the end of the day they are still an umbrella civ.

There’s plenty to add in Euro: Serbia, Romania, Croatia, Estonia, Albania, Switzerland (umbrella for Teutons, but you seem okay with that), Finns, Georgia, Armenia, Austria (another umbrella).

Here’s a topic with their histories summarized: