Groups were made based on Language family, Geography and Neighbouring countries. Language family (Romance = France, Italy, Portugal, Romania, Spain; Slavic = Belarus, Bosnia and Herzegovina, Croatia, Macedonia, Montenegro, Poland, Serbia, Slovakia, Ukraine, Russia); Geography (Central Europe = Austria, Belgium, Switzerland; Southwest Europe = France, Italy, Portugal, Spain; Nordic Co-operation = Finland, Nordic Co-operation, Sweden; Eastern Europe = Belarus, Poland, Romania, Russia, Slovakia, Ukraine; Southeast Europe = Bosnia and Herzegovina, Croatia, Macedonia, Montenegro, Serbia, Republika Srpska); Neighbouring countries (West = Austria, Belgium, France, Italy, Portugal, Spain, Switzerland, Nordic = Nordic Co-operation, Sweden; East = Belarus, Finland, Poland, Russia, Romania, Slovakia, Ukraine. Former Yugoslavia = Bosnia and Herzegovina, Croatia, Macedonia, Montenegro, Serbia, Republika Srpska. a, b: significant differences.