Only thing you need to know is that I live there xD
But hey, I have lotsa facts about Czechs and their language, which is pretty hard even to many natives
First of all, Czech language is Western Slavic, so we don't have that big problem to understand other Western Slavic languages, not even with Southern and Eastern (Only problem with those is cyrrilic). But, other Slavs do sometimes have problem with understandin' our language, thanks to its reforms and history.
For example, Czech and Polish were very similar languages 600 years ago. this changed when Master Jan Hus changed ligatures (for example, sz in Krakonosz) to more compact "hooks nad commas" (š in Krakonoš, both are sh in English BTW). This followed by other reforms differed Czech and Polish greatly, yet we still don't have that big problem with understandin' each other.
And when we're talkin' 'bout Jan Hus, this guy was very popular in Czech lands back then. But oh well, Catholics didn't like him, so they burned him in Konstanz in 1415. His followers, who called themselves Hussites, overthrew feudals 5 years after and started big-arse civil war because of this. They lasted for 30 years and defeated 4 crusades, only to lose to themselves. Their mighty chant "Ktož sú boží bojovníci" actually stopped last crusade, who simply turned around and fled from Czechia.
There's many more, but I sure bored ya enough today, this isn't bout Czechia after all :laugh: