Marshes are totally worthless so it seems lame to count them against people (other places this might help is in Central Africa and South America)Agreed. The Marshes in SE Asia especially are problematic for the Khmer.
Seattle: Xi Yatu (西雅圖
I can help out with a few other names as well; not just city names but ideas for vassal states' names as well.
EDIT: About flood plains in California. California historically wasn't very fertile. It was only after mass irrigation/dam and water diversion projects began in the early 1920's that California steadily became the top food producer here in the US. This isn't for or against flood plains. Just stating the fact for consideration. Also, now that I realize it, and have looked over North America, it needs A LOT more rivers.
http://www.desertusa.com/Cities/ca/imperial-valley-irrigation.html
I was actually thinking of having the floodplains appear in ~1900
Other places for floodplains would be the Mekong, Irrawaddy/Chao Phraya and Pearl Deltas
Nigeria's river is set up wrong, it needs to be adjusted
Regarding the Chinese names for cities in North America, am I the only West Coaster who is dismayed that the tile Portland ought to be on is just another San Francisco? Maybe it's regional pride speaking here, but that's something that's always bugged me.
Portland wasn't a very important city in comparison to San Francisco