I have been in Bratislava last week and 80-90% of people understand Croatian. Because all of them have been on, how they say, Slovensko more (Slovakian sea, Adriatic sea) and our languages are similar. I understood them too. It's not hard to understand when you just try to.
I knew it! Thanks for this information. There are so many Slovak tourists in the Dalmatian coastal region (in summer).