1, Korean is the language used in North Korea, South Korea, Northeast China, Russian Far East, Japan and other areas where Koreans live in concentrated communities.
The Korean dynasty didn't have its own writing until the Sejong period. They regard China's Chinese characters as their own national characters. King Sejong believed that having his own national script would have a great influence on the future development of the Korean dynasty and even future generations, so he created a simple and easy-to-learn script.