Question: When was the son of Sacagawea born  who learned several language from 1823 to 1829?
Related documents: [0]  [DOC] Charbonneau (also known as the Charbonneau District) is a private planned community within the city limits of Wilsonville in Clackamas County, Oregon, United States. It is on the opposite side the Willamette River from the main area of the city. The development was named for Jean Baptiste Charbonneau, the son of Sacagawea. [END] 
[1]  [DOC] 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. He spoke French and English, and learned German and Spanish during his six years in Europe from 1823 to 1829. He spoke Shoshone, his mother tongue, and other western American Indian languages, which he picked up during his years of trapping and guiding. [END] 
Answer: 
February 11, 1805
February 11, 1805