If you have the source of your custom module available, i can show you how to make it multilanguage capable yourself, or i could do it for you.
If you don't have the source, you would have to let me know (by email preferrably) who is the original author of the menu you are using, and i can contact him for you to inquire if he would be inclined to make his menu work with my modules....
cheers,
erik