The Old Yue language (Chinese: 古越語; pinyin: Gu Yueyu) is an unknown unclassified language (or many different languages). It can refer to Yue, which was spoken in the realm of Yue during the Spring and Autumn period. It can also refer to the variety of different languages spoken by the Baiyue. Possible languages spoken by them may have been of Kra–Dai, Hmong–Mien, Austronesian, Austroasiatic and other origins.