Address book > Edit > Edit
The Edit menu under the Edit menu of the Address book dialog should utilize the "_Edit" menu from gtk20.mo.
Why am I interested in doing the same for the menu entry in question?
In Hebrew, it is accepted to translate Edit in menu-bar to Editing, so using the _Edit entry of claws-mail.mo does not make the Edit menu entry under the Edit menu of the Address book dialog to look proper.
Buttons in which translations for _Edit is inherited from gtk20.mo
The correct solution here is not using translations from a different gettext domain, but rather using a different gettext context for those particular strings.