Question: When was the son of Sacagawea born  who learned several language from 1823 to 1829?
Sentence (from "Jean Baptiste Charbonneau"): Jean Baptiste Charbonneau (February 11, 1805 – May 16, 1866) was an American Indian explorer, guide, fur trapper trader, military scout during the Mexican-American War, "alcalde" (mayor) of Mission San Luis Rey de Francia and a gold prospector and hotel operator in Northern California.
Relevant evidence: Yes