There are six official languages of the UN. These are Arabic, Chinese, English, French, Russian and Spanish.

With the exception of Arabic and Spanish, the official languages are those of the permanent members of the Security Council who hold veto power (the U.S., Britain, China, Russia and France) - the most politically influential and powerful nations in period following WW2. Spanish is the second most spoken language in the world by native speakers. Arabic became an official language as a consequence of the Arabic-speaking members of the UN agreeing to pay the costs of introducing the language for three years.

Initially only English and French were the working languages of both the General Assembly and the Security Council. Working languages are the languages of “day-to-day professional exchanges” while the official languages are the languages in which all official documents must be written. Russian and Chinese achieved the status of working languages in the 60's and 70's respectively.

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