Thomas Jefferson was the most multilingual President of the U.S.A. Do you know how many languages he spoke?
Thomas Jefferson read a number of different languages. In a letter to Philadelphia publisher Joseph Delaplaine, Jefferson claimed to read and write six languages: Ancient Greek, Latin, French, Italian, Spanish, and English.
After his death, a number of other books, dictionaries, and grammar manuals in various languages were found in Jefferson's library, suggesting that he studied additional languages beyond those he spoke and wrote well. Among these were books in Arabic, Gaelic, and Welsh.
In regard to learning Spanish, Jefferson told John Quincy Adams that he had learned the language over the course of nineteen days while sailing from the United States to France.
He had borrowed a Spanish grammar and a copy of Don Quixote from a friend, and read them on the voyage. Adams expressed skepticism, noting Jefferson's tendency to tell "large stories."