Need help with action manager


I am writing some software where I have used an action manager.
In this action manager I have certain categories.
My problem is: how do I change the 'caption' on those categories?
It is very important as we got customers all over the world and they
all want the software to be in 'their own language' and we therefore
load all captions when the software starts.

Quick summary:
*need to change the displayed caption of a category (in action
manager) runtime
*need to have this change reflected in the captions of the menubars,
etc as well.