以英语为第二语言或外语 English as a second or foreign language
（重定向自English for Speakers of Other Languages）
以英语为第二语言（English as a Second Language；ESL）、以英语外语（English as a Foreign Language；EFL）皆指英语为其他非母语人士使用的情形或研究。这两个专有词汇跟语言学习和教学很有关系，也常用于人口统计学的领域。
English for Speakers of Other Languages
中文百科
英语百科
English as a second or foreign language 以英语为第二语言或外语
（重定向自English for Speakers of Other Languages）
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English as a second or foreign language is the use of English by speakers with different native languages. Instruction for English-language learners may be known as English as a second language (ESL), English as a foreign language (EFL), English as an additional language (EAL), or English for speakers of other languages (ESOL).