Korean is the official language of South Korea, while in North Korea (Chosŏn) it is called Chosŏnmal (Chosŏn Language). Both refer to the same language.
What is Simplified Chinese?
The variation in language-using habit also exists between mainland China, Singapore and other places where Simplified Chinese are used.
Story of Traditional Chinese
Traditional Chinese, a Chinese writing system traditionally used in Chinese culture, has a history of over 2,000 years and had been the standard written Chinese commonly used among Chinese population across the world until the 20th century.