Tibetan voiced consonants tend to be voiced, and the voiced consonants preserved in some areas are all voiced basic consonants from ancient consonants; Complex consonants tend to be simplified and disappear, and only binary complex consonants with prepositional consonants are retained in some areas.

Tibetan language is distributed in Xizang Autonomous Region and Qinghai in China, Ganzi Tibetan Autonomous Prefecture in Sichuan, Aba Tibetan and Qiang Autonomous Prefecture in Gansu, Gannan Tibetan Autonomous Prefecture in Gansu and Diqing Tibetan Autonomous Prefecture in Yunnan. Some people in Bhutan, India, Nepal and Pakistan also speak Tibetan. Tibetan is mainly divided into three dialects: Weizang dialect (Lhasa dialect), Kangba dialect (Dege dialect, Changdu dialect) and Amdo dialect (Qinghai Tibetan area).