Well German and English versions share the same codebase, but were different programs. The X-Mas Edition was never compiled in English. The main buttons are really equal in both versions, but error and status messages are different. You might try and replace them with a hex editor. I am not sure about code protection. I do not have the source, I am still trying to get it. Anyway, it's been 15 years and nobody has been working on it since then. We'll see.
In the meantime I recommend the Cyclone20 thread in prb.Hardware which is cool. :-)