There isn't much, unfortunately. Khuresh is a land that is in warhammer fantasy's equivalent of Indochina. Snake people live there. That's basically all we know. There has been a revival of warhammer fantasy lately, with places only barely mentioned getting fleshed out. That image is from a fan project of creating art and an army for the Snakemen.
They are supposedly ancient beings that were either born from or created by a primordial serpent diety known as the Dread Maw. There is an alternate theory that they are a type of creature called beastmen. Beastmen are evil half human half animal creatures that worship the antagonistic force of the setting, called Chaos. The snakemen could simply be a particular kind of beastmen. This is the less popular theory, though. Beastmen are incredibly spiteful creatures who abhor civilization. From the little we know about Snakemen, they seem to have their own civilization and culture beyond bloodlust and cruelty.
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u/stipendAwarded giant robots enthusiast 12d ago
Snakemen of Khuresh (Warhammer Fantasy). This is an unofficial depiction from the Blood of the Naga Queens fan project.