Sino Austronesian Languages
The Sino-Austronesian languages represent a proposed linguistic family that seeks to connect the Austronesian languages with the Sino-Tibetan languages. This hypothesis has been primarily advanced by the linguist Laurent Sagart, who has expanded upon earlier proposals to include connections between these two significant language families.
The Austronesian languages are among the world's most widespread language families, spoken across Maritime Southeast Asia, the Pacific Islands, and parts of Mainland Southeast Asia. The Austronesian family includes languages such as Malayo-Polynesian, which Sagart posits are related to the Tai-Kadai languages.
The Sino-Tibetan languages encompass a large and diverse group of languages spoken primarily in East Asia and South Asia. This family includes the Sinitic languages, which are widely spoken in China, along with several other language groups.
Laurent Sagart proposes that the Austronesian and Sino-Tibetan languages have a common origin, suggesting that monosyllabic words in Old Chinese may correspond to the second syllables of disyllabic Proto-Austronesian roots. This theory also places Tai-Kadai languages within the Austronesian family as a sister branch to Malayo-Polynesian.
The hypothesis has faced significant skepticism from other linguists, who argue that the similarities between Austronesian and Sino-Tibetan could be the result of historical language contact rather than a genuine genetic relationship. Weera Ostapirat supports a connection between Austronesian and Kra-Dai languages but rejects the notion that Sino-Tibetan languages are part of this link, citing the lack of consistent cognates across all branches.
Sagart's proposal intersects with the Austro-Tai languages hypothesis, which combines Austronesian and Kra-Dai languages. There is also a related theory in the form of the Austric languages, another proposed superfamily that includes Austronesian languages.