Okinawan (沖縄口, ウチナーグチ, Uchinaaguchi, [ʔut͡ɕinaːɡut͡ɕi]), or more precisely Central Okinawan, is a Northern Ryukyuan language spoken primarily in the southern half of the island of Okinawa, as well as in the surrounding islands of Kerama, Kumejima, Tonaki, Aguni and a number of smaller peripheral islands. Central Okinawan distinguishes itself from the speech of Northern Okinawa, which is classified independently as the Kunigami language. Both languages are listed by UNESCO as endangered.
Though Okinawan encompasses a number of local dialects, the Shuri–Naha variant is generally recognized as the de facto standard, as it had been used as the official language of the Ryukyu Kingdom since the reign of King Shō Shin (1477–1526). Moreover, as the former capital of Shuri was built around the royal palace, the language used by the royal court became the regional and literary standard, which thus flourished in songs and poems written during that era.
