South Korea's main language is harder to learn compared to ancient Chinese.
Hangul . Now , the alphabet is the official script of both South Korea and North Korea , and co-official in the Yanbian Korean Autonomous Prefecture and Changbai Korean Autonomous County of China 's Jilin Province . South Korea . Additionally , in 1443 Hangul was invented by the Korean King Sejong the Great as an easier alternative to the complex and difficult to learn ancient Chinese writing system which was usually reserved for elite academic scholars preparing for the imperial examinations of China .