 A language and a nation. There are more than 7000 languages nowadays in the world. Each of them is unique. Since ancient times, people tended to unite into small groups to protect their own interests. Long time ago they were called tribes. Now there are nations to replace the name. In order to understand each other, members of a group needed a language system. It is a system of sounds which should be clear to each member. But at the same time, this system must be unclear to enemy tribes. Such systems appeared and eventually transformed into languages. Though the most spoken language nowadays is certainly English, it doesn't mean that all the other languages will be forgotten in the nearest future. A nation's language is still an important element of national identity. There are so many interesting things in each language that there is even a branch of science studying them. This science is called linguistics. Linguistics itself has a lot of sections. Each language has its own history and cultural background. It has its own vocabulary, grammar, phonetics, etc.