Many of America's presidents were multilingual. I'll name a language, and you'll name a president that is/was at least semi-fluent in said language (not including English).
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Language
President
Dutch
Martin Van Buren | John Quincy Adams
French
John Adams | Thomas Jefferson | James Monroe | John Quincy Adams | William Henry Harrison | Theodore Roosevelt | Franklin Roosevelt
German
John Quincy Adams | Thomas Jefferson | Woodrow Wilson | Franklin Roosevelt
Ancient Greek
Thomas Jefferson | James Madison | John Quincy Adams | John Tyler | James Polk | James Buchanan | Rutherford Hayes | James Garfield | Chester Arthur
Italian
Thomas Jefferson | John Quincy Adams | Theodore Roosevelt
Latin
John Adams | Thomas Jefferson | James Madison | John Quincy Adams | Martin Van Buren | William Henry Harrison | John Tyler | James Polk | James Buchanan | Rutherford Hayes | James Garfield | Chester Arthur | Herbert Hoover | Franklin Roosevelt
Spanish
Thomas Jefferson | John Quincy Adams | Jimmy Carter | George W. Bush