The Sinitic languages (漢語族/汉语族), often synonymous with "Chinese languages", are a group of East Asian analytic languages that constitute the major branch of the Sino-Tibetan language family. It is frequently proposed that there is a primary split between the Sinitic languages and the rest of the family (the Tibeto-Burman languages). This view is rejected by a number of researchers but has found phylogenetic support among others. The Greater Bai languages, whose classification is difficult, may be an offshoot of Old Chinese and thus Sinitic; otherwise Sinitic is defined only by the many varieties of Chinese unified by a shared historical background, and usage of the term "Sinitic" may reflect the linguistic view that Chinese constitutes a family of distinct languages, rather than variants of a single language.