Language evolution refers to the gradual and complex process through which human language has developed and changed over time. It encompasses the historical, cultural, and biological factors that have influenced the emergence and development of languages. Language evolution involves linguistic features, grammar, vocabulary, and communication methods within human societies. This process occurs over generations and can be observed in various aspects, such as how languages diverge into distinct dialects and languages, how new words and expressions are coined, and how grammar rules and sentence structures evolve. Language evolution is driven by cultural, social, and environmental factors, and it continues to shape the way humans communicate with each other. Studying language evolution provides valuable insights into human cognition, social interaction, and cultural development. So far no one knows when human language started to exist on earth. However, it is common consent that the history of spoken language is earlier than written language. The spoken language was produced in the late Paleolithic period, about 40,000 to 50,000 years ago, and the appearance of writing is only a few thousand years.  Language evolution is also a change in the frequency of cultural variants in a society over time. Culture is the process of language evolution while civilization is the result of language evolution. A society cannot be without language, but it can be without writing words. Even today, there are still many ethnic groups in the world who only have language but no words.