I definately think that films like the ones you've discussed should be added. It's become harder and harder to say that a film is from just one country. American film uses many Canadian actors and films constantly in Canada, but it's not Canadian. As barriers in trade and finance break down, reason to remain exclusive to one country or culture deminishes. Colaborative efforts often make for a better movie. The best idea would be to simply put such films in under the foreign country they are most linked with and mention their american routes in the summary or comments