The Korean language reflects the important observance of a speaker or writer's relationships with both the subject of the sentence and the audience. Korean grammar uses an extensive system of honorifics to reflect the speaker's relationship to the subject of the sentence and speech levels to reflect the speaker's relationship to the audience. Originally, the honorifics expressed the differences in social status between speakers. In contemporary Korean culture, honorifics are used to differentiate between formal and informal speech based on the level of familiarity between the speaker and the listener.

When talking about someone superior in status, a speaker or writer must indicate the subject's superiority by using special nouns or verb endings. Generally, someone is superior in status if he or she is an older relative, a stranger of roughly equal or greater age, an employer, a teacher, a customer, or the like. Someone is equal or inferior in status if he or she is a younger stranger, a student, an employee or the like. The use of wrong speech levels or diction is likely to be considered insulting, depending on the degree of difference between the used form and the expected form.