Related/follow-up to #2743 ...
Describe your issue or idea
The settings in this page are already overwhelming as they are, and if more search items were to be added to the list, it would get longer and longer, requiring too much scrolling.
To top it off this section specifically does some weird things with its validation as well in order to ensure that the default search item does not get disabled, introducing a really weird UI pattern:

I feel that if we converted this to the same UI pattern we use in the Language management UI, it would be much better...
Steps to reproduce (if reporting a bug)
Navigate to /admin/config/search/settings
Actual behavior (if reporting a bug)

Expected behavior (if reporting a bug)

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)