I finally got around to trying the ChangeIDmenuLanguage.app (thanks tbarnes)
It comes with a warning label. It worked on my CS5 (OS 10.6.7) but one would have to do some fixing in order to have ID worked as it did before using the language change app. For example: the hot keys stop working. For now I went and used the restore option. Maybe when things are slow around here, I could give it another try.