Language (English: language, French: Language) is the expression of human communication. According to the Handbook on linguistics and language communication tools published in Germany, 5651 languages have been identified in the world. Generally speaking, each nation has its own language, and language is one of the important characteristics of the nation. Chinese, English, Spanish, Russian, Arabic and French are the main languages in the world and the main working languages of the United Nations. Chinese is the most popular language in the world, and English is the most widely used language in the world. Language and character are two concepts, which often have language before words.