What is the common language in Europe?

The common language in Europe is English.

English belongs to the west Germanic branch of Germanic family in Indo-European language family, which evolved from the languages spoken by Anglo-Saxon Germanic tribes and jute tribes who immigrated from the European continent in ancient times and spread to all parts of the world through active British colonization. According to the number of native speakers, English is the official language of the most used countries, the most widely used second language in the world, and one of the official languages of the European Union, most international organizations and Commonwealth countries.

But it has only the third mother tongue in the world, less than Chinese, Mandarin and Spanish. The leading position of Britain and America in culture, economy, military, politics and science in the last two centuries has made English an international language. Nowadays, English is used as a medium of communication in many international situations. English is also the language most closely related to computers. Most programming languages are related to English. With the use of the Internet, English is more widely used. English is one of the working languages of the United Nations.