Translating banner_manager & forms_manager

[museumdw]

While making a translating for dutch language, i notice that some items on the site were not. E.g. in the Dashboard menu, the items and its contents forms_manager & banner_manager. As these are present in the exetnsions directory /extensions/banner_manager & forms_manager, i wonder if there is a method to translate them also dutch. Off course i can do it, by copying the \dutch directory to /extensions/banner_manager/admin/language/dutch, but can i take it also in my language package ? Someone knows a solution ?