ESL (English as a secon language), ESOL (English for speakers of other languages), and EFL (English as a foreign language) all refer to the use or study of English by speakers with a different native language. 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, but they may also be used in relation to demographic information.