Antarctica (fictional)

The Commonwealth of Antarctica is the southernmost country in the world, as well as the only country to occupy an entire continent (as the continent of Australia also includes the island of Papua, which is divided between Indonesia and New Guinea). It is a Commonwealth Realm, originally formed in 1821 as a condominium between the UK, the US, France, Norway, and Russia. Its official languages are English and French, with Norwegian and Russian as recognized minority languages.