Koryo was a language spoken by the Koryoan people, inhabitants of the kingdom of Koryo in Kara-Tur. Koryo descended from the ancient Han language, as did Kozakuran and Wa-an, and possibly others. Its vocabulary comprised many words evolved from the old Han tongue, as well as loanwords from Wa-an and Kao te Shou that had been borrowed over centuries. Koryo's vocabulary was very different to that of Kozakuran, but its grammar was very similar. Koryo sounded more like Wa-an than Kao te Shou, but it was as simple to use as Shou.