This is basically a request to add https://www.drupal.org/project/admin_menu_source into Backdrop core:
This would be a nice solution for what this person is trying to achieve in https://forum.backdropcms.org/forum/flyout-menu (aside from the vertical placement of the admin bar).
This is one of the things I'm planning to discuss during the Content Author-centric UX improvements in core session in the upcoming Backdrop Live event.
GitHub Issue #:
5519
Recent comments
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)