International English the sphere of influence of English-speaking countries. Here English may serve as a useful lingua franca between ethnic and language groups. Higher education, the legislature and judiciary, national commerce, and so on, may all be carried out predominantly in English. The "expanding circle" refers to those countries where English has no official role, but is nonetheless important for certain functions, e.g. international business and tourism. By the twenty-first century, non-native English speakers have come to outnumber native speakers by a factor of three, according to the British Council. Darius Degher, a professor at Malmö University in Sweden, uses the term
English as a second or foreign language native languages. The many acronyms and abbreviations used in the field of English teaching and learning may be confusing and the following technical definitions may have their currency contested upon various grounds. The precise usage, including the different use of the terms ESL and ESOL in different countries, is described below. These terms are most commonly used in relation to teaching and learning English as a second language, but they may also be used in relation to demographic information. English language teaching (ELT) is a widely used teacher-centered term, as in the English language teaching divisions of large publishing houses,