The document discusses the global spread and use of the English language. It describes Krachu's three concentric circles model which divides the world into an inner circle of countries where English is the primary language, an outer circle where it is widely used as a secondary language, and an expanding circle where it is used primarily for international communication. It then covers topics like the relationship between globalization and the spread of English, how the role and nature of English has changed from modernity to post-modernity, and how demography and population shifts are influencing the use of English worldwide.