In the Indesign CS3 scripting guide there is a piece of explanation on menus. There is a script to write a list of all menu actions (in locale version). So if a element is not translated in locale version, you will see it in a second.
Could it help ?
PS: By the way can I invite you to help Thomas regarding to the button script ? He is in need of limiting the script action to items on a specific layer. I tried to help but not sure to implement your script well.