柯尔克孜语
Kizilsu, also spelled Kizil Su, refers to the Kezi River and means “red water” () in the Kyrgyz language, similar to the name of Kyzyl-Suu, Kyrgyzstan. Kizilsu is transliterated into Chinese characters as ", which is read in Mandarin Chinese as Kezilesu (pinyin-derived) and K'o-tzu-le-su / K'o-tzu-lo-su (Wade-Giles derived).