A family of Microsoft word processing software products for creating web, email, and print documents.
To modify the citation referencing via the field codes, you will probably need to copy whatever is between the field braces (I.e. { }) then delete the citation, then re-create the field via Ctrl-F9, insert the copied content then edit the locale switch. Do the same for the Bibliography.
However, the easiest way to do this is to go to Manage Sources>Select the author>Edit>then choose Hebrew from the language dropdown (assuming you have Office configured for this).