In this documentary, Stephen Fry will lead us to explore how to learn a language, how to write, and why it is sometimes difficult to express. 1) Babel in the first episode, Stephen reveals the origin of human language and why we are the only species with language ability, through experiments such as teaching orangutans to speak and implanting human language genes into mice to illustrate the unique relationship between human brain and language; 2) Identity the language we speak shows our characteristics, and even reflects class differences. At the same time, Stephen also explores the reasons for the irresistible globalization of English. 3) Uses and Abuses is often mixed with some bad words such as curses in the process of using the language. Stephen did an MRI scan and found that part of our brain is associated with foul language, so people with Tourette syndrome and stroke cannot speak foul language; 4) Spreading the World writing allows the preservation and transmission of knowledge, the fourth episode Stephen will introduce us to the origin and evolution of letters; 5) The Power...