エスキモー・アレウト語族
Many words are formed from entirely different roots from in Siberian Yupik, but even the grammar has several peculiarities distinct not only among Eskimo languages, but even compared to Aleut. For example, dual number is not known in Sirenik Eskimo, while most Eskimo–Aleut languages have dual, including its neighboring Siberian Yupikax relatives.