share English as a de facto official language); Spanish and Arabic are the languages of the two largest blocs of official languages outside of the permanent members (Spanish being official in 20 countries, Arabic in 26). Five of the official languages were chosen when the UN was founded; Arabic was added later in 1973. The United Nations Editorial Manual states that the standard for English language documents is British usage and Oxford spelling , the Chinese writing standard is Simplified Chinese . This replaced Traditional Chinese in 1971 when the UN representation of China was changed from the Republic of China to the People's Republic of China (see China and the United Nations for details). responsible for cooperation between states on economic and social fields (raising the general standard of living , solve economic, social and health problems, promotion of human rights , culture and education, as well as humanitarian aid ) therefore it has established numerous functional and regional commissions General Assembly The General Assembly is the main deliberative assembly of the United Nations. Composed of all United Nations member states , the assembly meets in regular yearly sessions under a president elected from among the member states. Over a two-week period at the start of each session, all members have the opportunity to address the assembly. Traditionally, the Secretary-General makes the first statement, followed by the president of the assembly. The first session was convened on 10 January 1946 in the Methodist Central Hall Westminster in London and