Meffy
humanoid skunk
I can see that working. And how to rationalize diplomacy without alphabet is easy -- the leader is so dedicated to diplomatic discourse that he or she sends personal envoys to neighboring civs. (Not actual units, this is just back-story.) The envoys' status would be somewhere between hostage and advisor. Surrendering their freedom, they would attach themselves to the other leader's court, learn the other civ's language and ways, and so forth. No exchange of documents required, messengers and an agent considered trustworthy by both parties would do.
Now: Would it broaden playing possibilities for players of many skill levels?
Now: Would it broaden playing possibilities for players of many skill levels?