Macrofamilies
Austric links the languages of Southeast Asia apart from Sino-Tibetan. Sagart proposes instead Sino-Austronesian, linking Austronesian and Sino-Tibetan; Starosta proposed a family called East Asian which covered both this and Austric. Genetic similarities between the peoples of East and Southeast Asian languages have led some to speculate about "Haplogroup O" languages. In a different direction, the Dené–Caucasian hypothesis links Sino-Tibetan to languages of Siberia (Dene–Yeniseian) and the Caucasus.
Read more about this topic: Languages Of Southeast Asia