ImaginaryCountries

Europe

• Belsornia -- From which Elisaveta of the Chalet School hies -- Somewhere between the Anschluss and the Soviet Union, near Mirania.
  
• Guilder -- from The Princess Bride, next to Florin.
  
• Florin -- from The Princess Bride, next to Guilder.
  
• Mirania -- see Belsornia.
  
• Latveria -- small Eastern European country ruled by Doctor Doom, of Marvel Comics fame.
  
• Symkaria -- adjacent to Latveria, same source.
  
• Novistrana -- from RepublicTheRevolution? (see http://www.eidosinteractive.co.uk/gss/republic/). Formerly part of the Soviet Union. No location given other than that, although there is ethnic unrest in the south, and all the names are very Russian, which suggests the Caucausus.
  

Americas

• San Theodoros -- South American dictatorship to which Tintin the boy reporter travels (and at one point is inadvertently appointed a colonel in the army of).
  
• Nuevo Rico -- hostile neighbour of San Theodoros, same source.
  
• Corquidicolandia -- see http://www.srcf.ucam.org/assassins/archive/special/generale03/
  

Asia

Africa

Rest of the World

• San Seriffe -- a small fictional island created by a (real) Guardian reporter for purposes of getting a delegates' pass at an international conference.