Step-by-step explanation:
Toussaint Charbonneau was a French Canadian fur trader who had lived among the Hidatsa and Mandan Indians since 1796. In October, 1804, when the Lewis and Clark expedition arrived at the upper Missouri villages, Charbonneau worked as an independent “free” trader living among the Hidatsa near present-day Bismarck, North Dakota.
The 45-year-old Charbonneau applied to be a Hidatsa interpreter. Clark wrote on November 4, a “french man by Name Chabonah...visit us, he wished to hire & informed us his 2 squars were Snake [Shoshone] Indians.” he helped with the expedition he gave contribution by other languages that Lewis and Clark did not interpret