Among the 56 ethnic groups, North Korea, Mongolia, Tibet, Uygur, Kazak, Kirgiz, Yi, Dai, Lahu, Jingpo, Xibe and Russian have their own written languages, while Han, Hui and Manchu use Chinese.

Among them, Mongolians use a vertical phonetic symbol, and Mongolians living in Xinjiang also use a phonetic symbol based on the common Mongolian language and suitable for the characteristics of Weilat dialect. Dai people in Yunnan use four Dai languages in different areas, namely Dai Nuo, Dai Na, Dai Zhan and Jinping Dai.

In addition, most Lisu people who believe in Christianity use capital Latin letters and their inverted forms to spell Lisu characters, and one or two districts in Weixi County use Lisu syllabic characters "Zhushu" created by local farmers. Some Christians in northeastern Yunnan use a script to put together symbols representing sounds, rhymes and tones to form a square. A few Wa people who believe in Christianity use the Wa script in Latin alphabet.

Since the founding of New China, the state has helped some ethnic minorities to improve and create scripts, so as to promote the development of their culture and education. The Dai language, Yi language, Jingpo language and Lahu language have been reformed successively, and Latin letters have been used to help Zhuang, Buyi, Miao, Li, Naxi, Lisu, Hani and Lisu people.

They are Mongolian, Tibetan, Uygur, Zhuang, Kazak, Xibe, Dai, Uzbek, Kirgiz, Tatar, Russian, Yi, Naxi, Miao Wen, Jingpo, Lisu, Lahu and Wa.

In addition to the words listed above, there are some words that have been used in history and are no longer used. These characters are 17 Turkic, Uighur, Chagatai, Khotan, Basiba, Xixia, Madong pictograph, Dongba pictograph, Shuishu and Manchu.

References:

Baidu Encyclopedia-Minority Languages and Characters