==Useful study== 

 Hi Ivan, I was directed to a paper describing an experiment done a few years ago by an American linguist, John Bailyn, concerning Croatian and Serbian. He basically had Croats translate several Serbian texts and found that the results support the single-language hypothesis on analysis of grammar alone because of the lack of modification done to the texts. No doubt this is another blow to the nationalist braintrust on Croatian Wikipedia that continually resorts to ad hominems and non-linguistic argumentation to preserve the image of Croatian and Serbian being different languages like Dutch and German or Danish and Swedish. The study is at https://linguistics.stonybrook.edu/sites/default/files/uploads/u5/publications/JSLBCS2.pdf