Related Clues:

• Pole or Bulgarian, e.g.
• Serb or Czech
• Bulgarian, for one
• Serb or Croat, e.g.
• Tesla, by birth
• Ostrava resident
• Ukrainian or Bulgarian
• Serb or Pole
• Bulgar or Pole, e.g.
• Croat or Serb, e.g.
• Czech or Croat
• From Prague
• Many a Balkan native
• Language where 'Jak se máš?' means 'How are you?'
• Cossack, usually