Koreanic languages in the context of "Japanese language"

The Altaic (/ælˈteɪ.ɪk/ ) languages are a sprachbund and rejected proposed language family comprising the Turkic, Mongolic and Tungusic language families, with some linguists having included the Koreanic and Japonic families. The proposed Altaic language family is no longer considered valid, as linguistic similarities among Turkic, Mongolic, and Tungusic languages are better explained by areal convergence within a convergence zone rather than by a shared genetic lineage, a phenomenon observed cross-linguistically in diverse language families worldwide.

These languages share agglutinative morphology, head-final word order and some vocabulary. The once-popular theory attributing these similarities to a common ancestry has long been rejected by most comparative linguists in favor of language contact, although it continues to be supported by a small but stable scholarly minority. Like the Uralic language family, which is named after the Ural Mountains, the group is named after the Altai mountain range in the center of Asia.

Jeju (Jeju: 제줏말; Jeju RR: Jejunmal, or Korean: 제주어; RR: Jejueo, or 제주말; Jejumal), often called Jejueo or Jejuan in English-language scholarship, is a Koreanic language originally from Jeju Island, South Korea. It is not mutually intelligible with mainland Korean dialects. While it was historically considered a divergent Jeju dialect of the Korean language, it is increasingly referred to as a separate language in its own right. It is declining in usage and was classified by UNESCO in 2010 as critically endangered, the highest level of language endangerment possible. Revitalization efforts are ongoing.

The consonants of Jeju are similar to those of the Seoul dialect of Korean, but Jeju has a larger and more conservative vowel inventory. Jeju is a head-final, agglutinative, suffixing language, like Korean. Nouns are followed by particles that may function as case markers. Verbs inflect for tense, aspect, mood, evidentiality, relative social status, formality, and other grammatical information. Korean and Jeju differ significantly in their verbal paradigms. For instance, the continuative aspect marker of Jeju and the mood or aspect distinction of many Jeju connective suffixes are absent in Korean. Most of the Jeju lexicon is Koreanic, and the language preserves many Middle Korean features and words now lost in Standard Korean. Jeju may also have a Peninsular Japonic substratum, but this argument has been disputed.

The Altaic (/ælˈteɪ.ɪk/ ) languages are a sprachbund and proposed language family comprising the Turkic, Mongolic and Tungusic language families, with some linguists having included the Koreanic and Japonic families. The proposed Altaic language family is no longer considered valid by the majority of scholars, as linguistic similarities among Turkic, Mongolic, and Tungusic languages appear to be better explained by areal convergence within a convergence zone rather than by a shared genetic lineage, a phenomenon observed cross-linguistically in diverse language families worldwide. However, a sizeable number of linguists still support the language family classification, citing morphological and grammatical similarities amongst the constituent languages.

These languages share agglutinative morphology, head-final word order and some vocabulary. The once-popular theory attributing these similarities to a common ancestry has been questioned by most comparative linguists in favor of language contact, although it continues to be supported by a smaller, yet stable scholarly minority. Like the Uralic language family, which is named after the Ural Mountains, the group is named after the Altai mountain range in the center of Asia.