Croatia
A 2011 survey revealed that 78% of Croatians claim knowledge of at least one foreign language. According to a survey ordered by the European Commission in 2005, 49% of Croatians speak English as the second language, 34% speak German, 14% speak Italian, and 10% speak French. Russian is spoken by 4% each, and 2% of Croatians speak Spanish. However, there are large municipalities that have minority languages that include substantial populations that speak these languages. An odd-majority of Slovenes (59%) have a certain level of knowledge of Croatian. The country is a part of various language-based international associations most notably the European Union Language Association.
Languages of the Republic of Macedonia
Serbian (српски, "srpski") is a standardized register of the Serbo-Croatian language spoken by Serbs, mainly in Serbia, Bosnia and Herzegovina, Montenegro, Croatia and Macedonia. It is official in Serbia and one of the official languages of Bosnia and Herzegovina, and is the principal language of the Serbs. Serbian is mainly spoken in the municipalities of Čučer Sandevo (~20% of the population) and Staro Nagoričane (19%).