What is TEFL? TEFL stands for Teach English as a Foreign Language. If you have decided to teach English to non-native speakers and finding out the required qualification you must have come across this term or any one of its acronyms (TESOL/ESL or even CELTA) including TEFL certification and other course-based certifications. Though fundamentally they mean the same, nevertheless there are some marginal differences. TESOL stands for Teach English to Speakers of Other Languages, ESL…