United Nations working languages[edit]

Originally, English and French were the working languages at the UN. Later, Arabic, Chinese, Russian, and Spanish were added as working languages in the General Assembly and in the Economic and Social Council. Currently, Arabic, Chinese, English, French, Russian, and Spanish are the working languages of the Security Council.[1]

Examples of common international organizations[edit]

English and French[edit]

The International Criminal Court has two working languages: English and French.[2] The Council of Europe,[3] the OECD, and NATO also have English and French as their two working languages.


The World Organization of the Scout Movement (WOSM) has English and French as official languages,[4] with Arabic, Russian, and Spanish as additional working languages.[5]

Portuguese and Spanish[edit]

The Organization of Ibero-American States (OEI), Ibero-American General Secretariat (SEGIB), Mercosur, and the Latin American Integration Association have two working languages: Portuguese and Spanish.

Heritage language

Lingua franca

International auxiliary language

List of official languages of international organizations