As a site admin I'd like to put my Backdrop sites in a 'real' maintenance mode when there is a critical security release and I don't have time to update all sites immediately.
The 'real' or 'actual' maintenance mode (or "vacation mode"?) would display a static page / a static version of the site and make it so that Backdrop isn't running anymore. That's a difference to the current maintenance mode where Backdrop continues to run, for instance to provide the login form. (I guess there are also other active functionalities in maintenance mode.)
Speaking of the login form: we need a way to login to a site which is in vacation mode. This could be implemented via settings.php.
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There is a Drupal 7 contrib module that "lets the administrator see all administration pages in her preferred language" and which could be ported to Backdrop: https://www.drupal.org/project/...
Allow admin to select admin language seperate from front end language (multilingual)
@stpaultim – You're right: my approach affects also the main menu. I guess, because menus are also considered as user interface (not as content). @findlabnet – If I didn't miss anything,...
Allow admin to select admin language seperate from front end language (multilingual)
Go to the account edit of the desired user. On the horizontal tab below "Region and Language," select "English" or another language. WFM.
Allow admin to select admin language seperate from front end language (multilingual)