Well, you first might want to find out how the game displays text strings in general. Then you can search for that display method for the debug strings. If you don't come up with something with that, it either uses a different method to display strings or it was broken on purpose. Then you might want to look for unused gfx and do the same there. If you still don't find anything, then there is problably nothing you can access.

cYa,

Tauwasser