Based on rural China, Mongolian

Food: Meats, fish, fruits, vegetables
Drink: Water, wine, fruit juice
Buildings:
On the surface: Simple mud structures similar to large meeting place(hall), individual homes, some homes can be carved into the many stone pillars - mainly high ranking people
Under the surface: there is an entrance to a cave that lead to an massive open area similar to a jungle/forest.
In a hidden place: T'Let is sealed along with S'Daara
Clothes: Simple tunics and pants
Warriors: Trained using magic/spells/dragons etc - Knows more about magic because T'Let was the leader of the Kuvan hundreds of years ago and had a massive hidden library of books with spells in it. They are extremely strong because of this, and some are physically strong and can go into a 'berserker' mode.
Government: Ruled by Kuvan leaders, follers of the 1st order of T'Let. Strict rules of secrecy - only the most trusted are allowed to leave for supplies and know about the origins of the Kuvan, and the secrets of T'Let
beliefs: They believe they rode a Great Dragon through the sky, but scales fell off its back dotting the sea creating islands. They take the Death Stones to a 'Forbidden Island' far to the north then its thrown around the Island in the se - looks like jewels in the water.