Description of the need
To configure a layout's page title, you need to visit the "Configure page title" page at /admin/structure/layouts/manage/<layout-machine-name>/edit-title/editor/title. A menu item for that admin page appears in the Backdrop admin menu, but that's easy to miss; no tab appears on any of the other Layout admin pages to let you reach the "Configure page title" page.
Proposed solution Like "Manage blocks" and "Configure layout," a "Configure page title" tab should appear at the top of each layout's admin pages.
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)