A number of Korean dialects are spoken in Korea and by the Korean diaspora. The peninsula is very mountainous and each dialect's "territory" corresponds closely to the natural boundaries between different geographical regions of Korea. Most of the dialects are named for one of the traditional Eight Provinces of Korea. In the Korean language, only the Jeju dialect is considered sufficiently distinct to be regarded as a separate language.
The Jeju people or Jejuans are a subgroup of Koreans native to the Jeju island, which is geographically located in the East China Sea. Administratively, they live in Jeju Province, excluding Chuja Islands, an autonomous self-governing province of South Korea.
Jejuans speak the Jeju language, which is considered to be one of the two branches of the Koreanic language family, as it has no mutual intelligibility with Standard Korean or any other Korean dialects in the Korean Peninsula. Jejuans also have unique cultural traditions that are distinct from mainland Koreans.