The German version of Wolfenstein is a little different from the version of Wolfenstein most of us will get to play.
The shooty bits will remain the same for everyone, of course, as you can see in this Eurogamer video. But Nazi imagery and mentions have been replaced with other stuff, if not outright removed. It seems inconsequential, but you also have to keep in mind that the entire game is normally about Nazis. While that is just as obvious even in the censored version, Nazis are instead called "The Regime" in the German version.
The censorship isn't surprising: Germany has laws that prohibit the public display of the swastika, and there was a rumor that Nazi imagery got a previous game in the franchise pulled from German shelves.