Jeju allophony involves a number of phonological processes also found in Seoul Korean. As in Korean, surfaces as intervocally. Also as in Korean, lax stops and affricates have fully voiced allophones in medial position, all obstruents have unreleased allophones in final position, and syllable-final sibilants surface as . Whether non-lax stops and affricates can appear in final position is controversial. The morphological analysis necessary for the government's orthography permits them, while the analysis behind the Jeju Language Research Society's orthography forbids them.