Korean is the native language for about 81 million people, mostly of Korean descent. It is the official and national language of both North Korea and South Korea. The language has notable differences in each of the Koreas, in part owing to different official standardizations of the language. They are still largely mutually intelligible, however. South Korean newspaper Daily NK has claimed North Korea criminalizes the use of the South's standard language with the death penalty, and South Korean education and media often portray the North's language as alien and uncomfortable.

The Yanbian Korean Autonomous Prefecture is an autonomous prefecture in the east of Jilin Province, China. Yanbian is bordered to the north by Heilongjiang Province, on the west by Jilin's Baishan City and Jilin City, on the south by North Korea's North Hamgyong Province and on the east by Primorsky Krai in Russia. Yanbian is designated as a Korean autonomous prefecture due to the large number of Chaoxianzu living in the region. The prefectural capital is Yanji and the total area is 42,700 square kilometres (16,500 sq mi).