Indigenous languages of the Americas are spoken by indigenous peoples from Alaska and Greenland to the southern tip of South America, encompassing the land masses that constitute the Americas. These indigenous languages consist of dozens of distinct language families, as well as many language isolates and unclassified languages. Many proposals to group these into higher-level families have been made, such as in three macrofamilies of Eskimo–Aleut, Na-Dené, and Amerind. This scheme is rejected by nearly all specialists.