I use the Map Labels Mod. It automatically adds feature labels to tiles that are similar. Fun mod in my opinion, though still in beta. https://forums.civfanatics.com/threads/map-labels.530637/ Am I right that you can actually see that boundary where the map warps, right? Kinda like a faint line. But there are two instance of this and they are not near that line. I'm so sorry. I do not have any idea. Deleted my posts.