Answer: Depends on the joke.
The Czech EU presidency has apologised for an art installation it commissioned that lampoons national stereotypes.
Czech Deputy Prime Minister Alexandr Vondra apologised directly to Bulgaria, which has formally complained over its depiction as a toilet…
The following is a silent overview of the work:
The quote above comes from a BBC story which has a BBC TV reporter creaming in his jeans over the insensitivity of the Czech artist, and the Czech artist being all arty and shit.
Ethnic sensitivity and humor: They don’t mix, and you won’t find either one in abundance in the Old Country these days.