I am pretty sure that if it is internship, even a payed one, it cannot count for CEC. It could, probably, as for work experience in general FSW, and for sure for the resume it will be counted as Canadian experience, but for immigration under CEC you should prove that you have a valid work permit, and the work cannot be part of your studies, therefore I still think it cannot count under CEC. May the more knowledgeable correct me.