Czech wikipedia has an article about Czech SW dubbing?
EDIT: Found it (I had no idea there even was a Czech wikipedia but I guess it makes sense that there would be). The dubbing I'm using for the DeEds is the original Guild Home Video dubbing. BTW it's pretty f*cking ridiculous that in the new Blu-Ray dubbing they used the actor who dubbed Luke in both the '92 and '97 dubs for Han Solo - I caught a bit of ESB on TV with the BD dubbing and it was horrible that whenever Han opened his mouth Luke's voice came out.
And Vader definitely never says "Jsem tvuj tatinek" (which would be the equivalent of "I'm your daddy") in any of the Czech dubs :-D