I *think* (correct me if I'm wrong) that the slider titled "Flatness" is in fact "variability" and the higher the value, the more different biomes you see.
I generated a couple worlds with "Flatness" almost zero & swamp main biome, and these both were utterly flat, endless swamps. I generated a world with "flatness" in 80s & swamp main biome -- lo and behold, there are chunks of different biomes, there are mountains and forests.
Feels like a blind idiot translation
Come on guys, I am Russian but even I can see these things are seriously wrong. It's like these bootleg Photoshop localizations that title the opacity slider "transparency"
Also, all the sliders require detailed explanations of what they do.
it's too EXPENSIVE in terms of effort invested to find that you generated a ****ty world only after hours of playing.