Korean language, the official language of Republic of Korea, is spoken by more than 80 million people worldwide. Korean language is considered a language isolate by most of the historical as well as modern linguists. The language is mostly spoke by people in south Korea and north Korea. However, the language used in both the places differ in pronunciation, grammar, spelling and vocabulary. It is also spoken by the Korean diaspora in different countries. However, because of the cultural assimilation into the host countries, the native fluency gets affected. Many small local dialects are attached to the language and all are similar to each other. Initially the language was written in Hangul script, but with time a mixed script, Hanja script is being used to write in Korean language.