In Europe, with the expansion of the powerful Roman Empire, Latin once became the lingua franca. But with the decline of the empire, the peoples borrowed Latin and developed their own language system. Since then, wars have continued in Europe and languages have penetrated into each other. After the Duke of Norman conquered England, French became the language of the court aristocracy and speaking French became a symbol of status and status. Until the beginning of the twentieth century, French was still respected in European international conferences for its accurate meaning and no ambiguity, and the official diplomatic texts were basically in French. However, after entering the modern industrial society, with the rise of British and American countries, English has gradually become strong. After World War I, English and French became the working language of European international conferences at the same time. After World War II, due to the establishment of American hegemony in the world, English gradually surpassed French and became the most widely used language in diplomatic situations.
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There is a close relationship between language and politics.