Which language is known as the 'Language of Diplomacy' due to its long history as the international language of relations?
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French
French held this title from the 17th century until the mid-20th century. Today, while English has largely taken over, French remains an official language of the UN and the Olympics.
Also asked as:
- What language served as the primary international medium for relations from the 17th to the mid-20th century?