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] 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.
[5] 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.