Language is the most important of human communication tools, it is people for communication of representation of symbols. By people with language preservation and transmit the results of human civilization. Language is one of the important feature of the nation. Generally speaking, each nation has its own language. Chinese, English, French, Russian, Spanish, Arabic, is the major languages in the world, also is the work of the UN language. Chinese is spoken in the world's most populous language, English is the most widely used language. According to the German published "linguistics and language communication tool problem manual", and said, now the world find out for 5651 of the language. In these languages, about 1400 kinds of is not recognized by people is independent of the language, or is the language of the decline is.