You definitely have more than just those two mods installed. You have some mod that removes all name localization, which Townie Demographics relies on to work. Come to the Discord server for troubleshooting.
I happen to have the same Cowplant new names mod that mcgi97 mentioned above.
I had no idea that mod removed all name localization.
Even if I didn't want your mod - that's a severe change that would likely have all kinds of downstream conflicts.
Removing that mod and I was able to get into my game with your mod still there.