English is an International language and there are hundreds of varieties of English. English is spoken as a first or second language or is (or was) an official language in over 75 territories.
Approximately 323 million speakers in 58 different countries speak English as their first language and about 422 million speakers in 66 countries speak English as their second language. It is estimated that there are around a billion people learning the language today. But which variety? As the OUO coursebook expands, we hope that it will, with your input, include materials in the variety of English that is useful for you and your students.