If you are worried about the other tables recognizing the translation, they will. The object reference is truly changed when the translation takes place. The SF user control has a property named BOTranslations that allows you to drop the user control on a form and then have the BO on the form translated into the user control. So any other BOs that reference the BO on the parent or within the child will be looking at the same business object specified in the "source" translation BO.