I checked it and you're right. I'm surprised that this was overlooked. Do you guys know of any other places in the original trilogy or the prequels where there are any German subtitles that were accidentally left in the Wookiegroomer set?

That part in The Phantom Menace from this set will have to be replaced in order to have it be correct. So either Wookiegroomer or another fan with access to the highest quality recording available of the SKY HD broadcast will have to replace the video where the German subtitles are present with the proper English video, while blending in seamlessly with the German broadcast video that comes before and after. It's only a few seconds, so it shouldn't be that hard.