The ancient Koreans spoke Korean, but before King Sejong created Hangeul in 1443, Korea did not have its own written language.
So I was speaking Korean and writing Chinese characters.
After King Sejong established Hangeul, he began to write in Hangeul. But it's broad.
Chinese characters are very difficult for Koreans, while Korean characters are very easy for Koreans.
Therefore, the imperial examinations at that time were all conducted in Chinese characters. On the one hand, it was the influence of Chinese characters, and on the other hand, the nobles wanted to monopolize official careers. Therefore, the scholar-bureaucrat class mostly used Chinese characters, while the common people mostly used Korean characters.
When the famous tyrant Yeonsangun came to power, many people used Korean to write messages, so Yeonsangun ordered a ban on Korean.
After Emperor Zhongzong revolted, he lifted the ban on the Korean language. Korean characters are mostly used in novels, poems and religious books, while Chinese characters are mostly used in government orders, historical books and medicine. Especially in court situations, Chinese characters are used, but among palace ladies, Korean characters are used.
Since the end of the 19th century, Chinese characters have gradually withdrawn from Korean life. On August 15, 1948, the Republic of Korea was established. On September 9 of the same year, North Korea was established. The Korean nation also fell into division like China in the future. However, both South Korea in the south and North Korea in the north use the Korean character as the national character.
After the 1950s, North Korea banned the use of Chinese characters, while South Korea did not completely ban it, but the national language was Korean, and Chinese characters were added in formal occasions.
Korean has some Chinese characters, some foreign words, and some inherent words, but no matter what kind of words, they are all written in Korean characters.
As for English, I have known it since the 1840s when I learned about Britain.