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 Configuration/Edit accounts... Tools/Address book
The correct solution here is not using translations from a different gettext domain, but rather using a different gettext context for those particular strings. See https://www.gnu.org/software/gettext/manual/html_node/Contexts.html