403 instead of 404 + translation

Hi,

I am trying out some different combinations of settings for the plugin.
When the most simple version, Hide complete, is used, the user will receive a 404 error on trying to visit a page for which the user does not have access rights.
Wouldn’t it make sense to throw a 403 (forbidden) error (or let users select wether to throw a 404 or 403 error)? Technically 404 is incorrect; the page does exists.

In my case that would be very very helpful, so I could style my 403 and 404 error pages differently, which is in my opinion more user-friendly.

Unrelated: I saw some uncompleted Dutch translations and would be happy to complete them. What would be your preferred method for receiving/dealing with translations?