I think the supplied english.dat file got corrupted somehow (I re-downloaded the file to confirm), so I decompiled the script and rebuilt both. Menus and inventory items now read properly.
Sorry to bump an old thread but I believe I suffer with this. I've tried to edit my scripts in my level so people can't fly around and would like to fix the title. But with the program I'm using it doesn't really work when I try to build the script.