I have always found it annoying to have GIMP (as an OS X app package) in my own language with translated function and menu names, while all the tutorials and image manipulation manuals around are in English. I am not sure whether there are other solutions to this problem, but I could not find many. I did find this script...
do shell script "LANGUAGE=en /Applications/Gimp.app/Contents/MacOS/gimp"
...that actually works, but in this way, I need one icon on the Dock to start The Gimp and another one for the application itself -- in case I need to drag and drop a file. That's a bit too much for me. All right, maybe I could have written another script to open either the application in English or the dragged and dropped file. Instead, I found another solution.
Mac OS X Hints
http://hints.macworld.com/article.php?story=20070423133918443