Originally Posted by JurajCrane
Yes, only few common words. Slovaks understand Czechs without problems (obvious reasons) and only little problems in comunication are with Polish people.
Croats, Serbians, Russians are more problematic, but one can get through it if he tries hard
I've seen Slovaks ordering in restaurants and buying things in shops speaking Slovakian in Croatia, and it kind of worked, that's why I asked.