The Department of English Language Teaching (DELT) represents the practical, task oriented aspect of Teaching English as a second Language (TESL) in the University of Kelaniya.  It is a part of the Faculty of Humanities, but provides English courses to all the Faculties of the University of Kelaniya.  Its strength lies in its ability to liaise with students and staff from all disciplines and the department provides English for Specific Purposes (ESP) or English for Academic Purposes (EAP) courses as needed. The DELT courses are offered to students of all levels of study. 

The DELT also offers a Teaching English as a Second Language (TESL) Honours degree to those who wish to pursue a career in teaching English as a Second Language.  The degree in TESL focuses on creating professioals in teaching english in Sri Lanka, and is different from the degree in English offered by the Department of English.