第二語言
In the US, Canada, Australia, and New Zealand this use of English is called "ESL" (English as a second language). This term has been criticized on the grounds that many learners already speak more than one language. A counter-argument says that the word "a" in the phrase "a second language" means there is no presumption that English is "the" second acquired language (see also "Second language"). "TESL" is the teaching of English as a second language. There are also other terms that it may be referred to in the US including ELL (English Language Learner) and CLD (Culturally and Linguistically Diverse).