The Zhuang have their own scriptures written in poetic form such as the "Baeu Rodo". The literate Zhuang had their own writing system, Sawndip, recording folk songs, operas, poems, scriptures, letters, contracts, and court documents. The works include both entirely indigenous works and translations from Chinese, fact and fiction, religious texts and secular texts. While most Zhuang people have adopted standard Han Chinese names, some have distinct surnames only found amongst those of Zhuang descent such as "覃" (), usually pronounced "Tán". When comes to places, some village names in China have the suffix "板" (), which means ""village"" in Zhuang (e.g. 板塘, 板岭乡, 板帽, 板罕). Most Zhuang follow a traditional animist faith known as Shigongism or Moism, which include elements of ancestor worship. The Mo have their own sutra and professional priests known as "bu mo" who traditionally use chicken bones for divination. In Moism, the creator is known as Bu Luotuo and the universe is tripartite, with all things composed from the three elements of heaven, earth, and water. There are also a number of Buddhists, Taoists, and Christians among the Zhuang. Zhuang cuisine includes many salty and sour dishes such as pickled cabbage, pickled vegetables and pork, and dried fish. A common Zhuang drink is "oil tea", tea leaves fried in oil with rice grains brewed and drunk with peanuts or a rice cake. While Chinese scholarship continues to place the Zhuang–Dong languages among the Sino-Tibetan family, other linguists treat the Tai languages as a separate family. They have been linked with the Austronesian languages, which dispersed from Taiwan after a migration from the mainland. However, the Austro-Tai hypothesis uniting these families is now supported by only a few scholars. Genetic evidence points out Zhuang possesses a very high frequency of Haplogroup O2 with most of them being subclade O2a making it the most dominant marker, one that they share with Austro-Asiatic. The other portion of O2 belongs to subclade O2a1. Zhuangs have prevalent frequencies of O1 which links them with Austronesian, but O1 is at much lower rate compared to O2a and only slightly higher than O2a1.