While the McRib is just starting to return in the US market, it has been on the menu in El Salvador since October 20th. The McDonald’s El Salvador limited time offering appears to be offered as traditionally served in the United States. 
If you find a McRib make sure to report it http://mcriblocator.com/report.html and send us a photo of your receipt (showing location and date purchased as well as your McRib order) to photos@mcriblocator.com . Thank you!