The Korean language family primarily consists of the Korean language, which is spoken in both South Korea and North Korea. It is considered a language isolate, meaning it has no confirmed relation to any other language family. Some linguists suggest possible connections to the Altaic languages, but this remains a topic of debate. Korean is written using the Hangul script, developed in the 15th century. The language has a complex system of honorifics that reflects social hierarchy and relationships. Additionally, it has borrowed vocabulary from Chinese and English, enriching its lexicon over time.