South Korean standard language
South Korean standard language or Pyojuneo (Korean: 표준어; Hanja: 標準語) is the South Korean standard version of the Korean language. It is based on the Seoul dialect, although various words are borrowed from other regional dialects. It uses the Hangul alphabet, created in December 1443 by Joseon-era king Sejong the Great. Unlike North Korean standard language (Munhwaŏ), South Korean standard language includes many loan-words from Chinese, as well as some from English and from other European languages.
When Korea was under Japanese rule, the use of the Korean language was regulated by the Japanese government. To counter the influence of the Japanese authorities, the Korean Language Society (조선어 학회) began collecting dialect data from all over Korea and later created their own standard version of Korean, Pyojuneo, with the release of their book Unification of Korean Spellings (한글 맞춤법 통일안) in 1933.