Prof. Yehuda Bauer was a historical consultant for Shoah (1985). Director Claude Lanzmann interviewed him for his epic documentary, but didn't use it in the final cut. This interview and all the other outtakes of the film are now in the public domain and part of the 'Claude Lanzmann Shoah Collection' in the 'Steven Spielberg Film and Video Archive'.
He is fluent in Czech, Slovak, German, Hebrew, Yiddish, English, French, and Polish.