I've worked for a health service that hires a number of IMGs who have completed "internship" in their home countries into PGY2 RMO roles (the service had a big shortage in junior doctors, but not interns), but they are then essentially treated like interns - only directly supervised practice, no rural rotations, no overnight ward call etc. They are mandated to do medicine, emergency and surgery rotations just as our domestic interns are despite completion of internship in their home country. The main difference between them and domestic interns is that they are paid slightly better and have different assessment processes. I believe a number of these (?all) were under the WBA program for accreditation.