Welcome to WebmasterWorld Guest from 188.8.131.52
That would be like putting up a directory of US cities on a widget site to target more local searches for widgets. It generally doesn't make sense to do that, unless there's actual local content that's really unique to the locale.
Websites that provide content for different regions and in different languages sometimes create content that is the same or similar but available on different URLs. This is generally not a problem as long as the content is for different users in different countries. While we strongly recommend that you provide unique content for each different group of users, we understand that this may not always be possible for all pages and variations from the start