Fun little step I added in my solo run: At the end of each era after the first, for each region (so each player), I created an idiom around what was currently known of the world. A saying for local customs.
For instance, and mind that these are rather Chinese in nature due to this run being used to develop a wuxia setting... "I'll see you at Niangmukan" is a way to tell someone their goal is unattainable. It refers to the sacred site of one of the celestial beings established in the second age, which is so remote as to be considered mythical.
In another example, "awakened by a fulurong on the side of the road" is a reference to an animal chosen as one of the "resources" of my world, whose horns naturally balance qi around it. In other words, this idiom is a fancy way of describing a windfall.
I'm really digging this step because it helps add that little bit of extra oomph to the lore, so I figured I'd share in case anyone else wanted to take on a similar approach.