契丹大字
Mongolian has been written in a variety of alphabets, making it a language with one of the largest number of scripts used historically. The earliest stages of Mongolian (Xianbei, Wuhuan languages) may have used an indigenous runic script as indicated by Chinese sources. The Khitan large script adopted in 920 CE is an early Mongol (or according to some, para-Mongolic) script.