Decision on what to do with data depends not only on the data themselves but also on the goals of the application, so first you should understand whether all of the duplicates play the same role or not. E.g. in one app I have two regions - on is plan region and other is fact region of sales.
Say if your Contry fields play the same role it's more then reasonable to put in into one table, as well as other duplicates. Here we come to the idea of link table but again that depends on your requirements.