They agreed to hire Charbonneau as an interpreter because they discovered his wife spoke Shoshone, and they knew they would need the help of Shoshone tribes at the headwaters of the Missouri.
Contrataron a Charbonneau como intérprete cando descubriron que a súa esposa falaba shoshone, e coidaban que precisarían da axuda das tribos shoshone no nacemento do Missouri.