Changing part of URL in MVC

This seems pretty easy using routes,
but i am stuck with another issue
 
now what client wants is if client puts this in url
 
www.SomeSIte.com/Home/Products
 
it should change to
 
www.SomeSIte.com/US/Products
 
and so on there are other url's that needs to be changed.
 
Now with routes we can define it but how to change the URL displayed?