Darth Vader = Dark Vador
Luke Skywalker = Luc Skywalker (it is even rumored that Skywalker was changed to Courleciel (skyrunner) in the end titles of Star Wars)
Han Solo = Yann Solo (only in Star Wars. He's called Han in ESB and ROTJ)
C3PO / 3PO = Z6PO / 6PO
Chewbacca / Chewie = Chiquetabac (litterally Chew Tobacco) / Chico (only called like this in Star Wars)
and some locations and ships too :
Millenium Falcon = Millenium Condor (only in Star Wars)
Death Star = L'Etoile Noire (Black Star)
Alderaan = Alderande