When there are both multiple as well as single-item drop buttons on the same page/table, there's inconsistency on their width and text alignment:

That's because the multiple-item drop buttons need extra width in order to accommodate the drop arrow on their right side.
Here's how it would look with width: 113px and text-align: left applied to the single-item drop button:

GitHub Issue #:
1090
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)