Hey, I just thought of something for the Lizardfolk. They did this in FFH2 recently in what the maker of the expansion patch called Fall Further. Anyway, wherever the Lizardfolk settle, swampland and marsh grows up. It gives the Lizardfolk more food than normal land and hampers their enemies by slowing movement speed. Also, the roads are replaced by paths and the swampland never covers resources. I know that might be a lot of work to implement. Plus, I have no idea if you guys want to do that for the Lizardfolk. Just figured I'd tell you.