CELTA - Certificate in English Language Teaching to Adults
DELTA - Diploma in English Language Teaching to Adults
EAL - English as an additional language
EAP - English for academic purposes
EFL - English as a foreign language
The study or learning of English in an environment where English is not the predominant language, such as in a non-English-speaking region, by someone whose first language is not English.
EIL - English as an international language
ELF - English as a lingua franca
ELL - English Language Learner
ELT - English language teaching
ESD - English as a second dialect
ESL - English as a second language
The study or learning of English in an environment where English is the predominant language, such as in an English-speaking region, by someone whose first language is not English.
ESOL - English for speakers of other languages
ESP - English for Special Purposes or English for Specific Purposes or English for Specific Professions (e.g. technical English, scientific English, English for medical professionals).
IELTS - International English Language Testing System
TEFL - Teaching English as a Foreign Language
The teaching of English in an environment where English is not already the predominant language, such as in a non-English-speaking country, to someone whose first language is not English.
TESL - Teaching English as a Second Language
The teaching of English in an environment where English is the predominant language, to someone whose first language is not English.
TESOL - Teaching English to Speakers of Other Languages (or) Teaching English as a Second or Other Language
This acronym might be a substitute for TESL more than for TEFL. It is sometimes preferred over TESL because English can be a third, fourth or fifth, etc. language to a student.
TOEFL - Test of English as a Foreign Language
TOEIC - Test of English for International Communication
UCLES - University of Cambridge Local Examinations Syndicate