エスキモー・アレウト語族
Phonologically, the Eskimo–Aleut languages resemble other language families of northern North America (Na-Dene and Tsimshianic) and far-eastern Siberia (Chukotko-Kamchatkan). There are usually only three vowels—, , —though some Yup'ik dialects also have . All Eskimo–Aleut languages lack ejectives, in which they resemble the Siberian languages more than the North American ones. Eskimo–Aleut languages possess voiceless plosives at four positions (bilabial, coronal, velar and uvular) in all languages except Aleut, which has lost the bilabial stops (though it has retained the nasal). There are usually contrasting voiced and voiceless fricatives at the same positions, and in the Eskimo subfamily a voiceless alveolar lateral fricative is also present. A rare feature of many dialects of Yup'ik and Aleut is contrasting voiceless nasals.