I can recall in 1998 I was studying in Germany, taking a semester break from my CS studies. For the fun of it, I checked out the books being used by the CS prog

I can recall in 1998 I was studying in Germany, taking a semester break from my CS studies. For the fun of it, I checked out the books being used by the CS program - all the textbooks were in English, and I then learned that in that program, most of the classes themselves were conducted in English as well. I know since then that English has become common in courses in many universities in Germany, but at the time it was just a sign of things to come. As other commenters have expressed - it's a vocabulary problem. If there isn't an accepted translation into another language, than the English term will stand (assuming it is the originating language for the concept).