CTESOL is an initialism that stands for Christians Teaching English to Speakers of Other Languages as indicated by the top level domains. It also stands for Certificate in Teaching English to Speakers of Other Languages, but this meaning varies in definition between British English and American English. Having that both the secular and Christian institutions were originally founded in North America, TESOL in this context would be an umbrella term to cover both the teaching of ESL and EFL. In British English TESOL would have a much more specific meaning.
CTESOL is an initialism that stands for Christians Teaching English to Speakers of Other Languages as indicated by the top level domains. It also stands for Certificate in Teaching English to Speakers of Other Languages, but this meaning varies in definition between British English and American English. Having that both the secular and Christian institutions were originally founded in North America, TESOL in this context would be an umbrella term to cover both the teaching of ESL and EFL.