What are the main objectives of United Nations?

The UN has 4 main objectives

To keep peace throughout the world;

To develop friendly relations among nations;

To help nations work together to improve the lives of poor people, to conquer hunger, disease and illiteracy, and to encourage respect for each other’s rights and freedoms;

To be a center for harmonizing the actions of nations to achieve these goals.

for more info visit : http://www.un.org/en/aboutun/

What are the Official languages of United Nations?

Arabic, Chinese, English, French, Russian and Spanish are the UN official languages.

The working languages at the UN Secretariat are English and French.

for more info visit: http://www.un.org/en/aboutun/languages.shtml