EASA English is name of language proficiency qualification introduced by Ec 1178/2011, Part FCL, FCL.055. EASA English mandates pilots to attend specific language proficiency exam in order to evaluate their language skills in using of English language in situations requiring other than standardized aviation phraseology.
With regards to EASA flight crew licenses in most of the cases the wrong naming is used. ICAO English is used instead of EASA English to describe the language proficiency endorsement required by EASA. In such case both - ICAO English and EASA English are evaluated at the same time, thus the correct wording should be language proficiency or EASA English.
Procedures for language proficiency assessments are throughly described in Part FCL, FCL.055 and in respective acceptable means of compliance.