Ok, so this is a very specialized hint. I'm currently studying Japanese, and use the EGbridge 15 software for Japanese input. The software is nice, but the menu is only in Japanese, and as I'm not fully fluent yet, this is a tiring thing for me ... so I localised the input menu in English.
The files for adding an English localization to EGBridge and some explanations can be found here.
Mac OS X Hints
http://hints.macworld.com/article.php?story=20050927014717448