Aleut is a 'foreign' language -- in Alaska;
Navajo is a 'foreign' language in Arizona and New Mexico;
Dakota, the 3rd most spoken (beat out by native English and Spanish?), is the foremost 'foreign' language in South Dakota!!!
A political territory's existance does not rely on the language(s) spoken within it, aside from the necessary mutual communication of its constituants. This is quite apparent in history's list of conquests -- and a language's origin relates to its earliest and greater area of habitat. The territorial conqueror's language may, eventually, become the predominant, but it does not erase the nativity of language(s) already there! During all of recorded history, English and Spanish were not native to the Americas; Aleut, Navajo and Dakota were -- and are native! English and Spanish were once foreign languages in the Americas -- Native American languages never were.
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