Korean Speech Levels
한국어의 어역 (문체)
Korea retained much of Ancient China’s customs and culture. When addressing people of a higher, lower or equivalent status, a different speech level should be used, i.e. a different set of conjugations. These speech levels are referred to as 어역・語域 or 문체・文體. There are, in fact, 7 distinct speech levels in Korean. The most elevated one, 하소서체, became obsolete in real life, since it’s only used when addressing the Emperor, royal family members and important governors.
Source can be found here.








