Official language was Serbo-Croatian. That was a mixture of today Serbian, Croatian and Bosnian. Beside that, official in Slovenia republic (north-west) Slovenian was spoken and in Macedonia republic (south-east) Macedonian language.. Some minorities in Serbia spoke Slovakian, Russian, Romani, Czeck, Hungarian (north), Albanian (south) After wars during '90, disappearing of Yugoslavia and proclaiming independence from it, every republic put their language as official (Croatian, Serbian, Bosnian, Slovenian, Macedonian, Montenegrin).
All of them still trying to make a distance from history they lived together and emphasise difference between their and surrounding countries languages (making up new words, fools and horses is common for that reason) but the core of all those is the same and difference is just in dialect! Proof of that is that all people from those new countries can easily understand each other in every single situation According to Snezana Kordic, famous Croatian linguist, all those languages are same in 82% in everyday speaking and even more (almost 100%) if all of us use standard grammar and phonemes Please see the first related link below for information on the differences between the languages spoken in Yugoslavia Please see the second related link below for information on the youngest Balkan official language.
For the answer to the question of what language is spoken in Montenegro, the Serbian Orthodox Church directs the curious to centuries-old Orthodox textbooks. On the other hand, the Montenegrin Orthodox Church constitution recognizes Montenegrin, using the Cyrillic alphabet, as the official language. “Our faith in the Orthodox Church, the Montenegrin people, the nation, and the language should be tough and strong in order to obtain independence,” is the MPC’s official stance.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.