Caijia (Chinese: 蔡家话) is an endangered Sino-Tibetan language spoken in Guizhou, China. It was discovered in the 2000s. It appears to be related to Bai. The autonym is men˧˩ni˧.The Caijia people are ethnoculturally related to the Lu (卢) people (Luren 卢人), who are classified as Manchu by the Chinese government. It is possible that their language is closely related to Caijia. Caijia is also likely to be closely related to Longjia (龙家). Caijia, Longjia, and Lu are all spoken in western Guizhou.