More then 350 million of the world’s population are first speakers of English; they have English as their mother tongue. For each native speaker of English there is three who have English as there second language or a lingua franca. To have a lingua franca means that this is the language you use in conversation with others that don’t share your mother tongue. A Japanese woman and a Norwegian man who are having a discussion about international politics and businesslife over a warm cup of coffee will most likly speak English to each other.
There is also some countrys that have English as their official language. English is for example the official language of India. All the official documents in India are in English and people in businesslife uses English. Even though Eglish is the official language, India has a bunch of other language that people use in the every day life.