Buyeo languages

Buyeo or Fuyu languages (부여 in Korean, Fúyú (扶餘) in Chinese) are a hypothetical language family that consists of ancient languages of the northern Korean Peninsula, southern Manchuria and possibly Japan. According to Chinese records, the languages of Buyeo, Goguryeo, Dongye, Okjeo, Baekje—and possibly Gojoseon—were similar. Ye-Maek may have been ancestral.

Classification of the Buyeo languages

The relationships of the poorly attested Buyeo dialects are disputed.

Japanese–Koguryoic hypothesis

The Korean state of Baekje was founded by Goguryeo princes, and considered itself descended from Buyeo. Baekje subsequently had close relations with Yamato period Japan; Christopher Beckwith suggests that at that point the Japanese may have still recognized a relationship to Buyeo. Beckwith reconstructs about 140 Goguryeo words, mostly from ancient place names, including Gaya. Many include grammatical morphemes which appear to be cognate with morphemes of similar function in Japanese, such as genitive -no and attributive -si.