Guesses...
Sounds more like Utah Phillips to me.
From Wikipedia: Coeur d'Alene (Cœur d'Alène) is a Salishan language spoken by only five of the 800 individuals in the Coeur d'Alene Tribe on the Coeur d'Alene Reservation in northern Idaho, United States. It is considered an endangered language.

Seems like she might have meant a language understood by few.