Prof. Khaja is a Certified International French Examiner-Grader of France Education International for official French diplomas DELF A1 (beginners), DELF A2 (advanced beginners), DELF B1 (intermediate), DELF B2 (advanced) of French Ministry of Education. D27 FRENCH LANGUAGE CENTRE online platform, open 24/7 to all registered clients and members for more details, also caters for translation works in French-English-Bengali of all business, social, technical and academic documents.