Administration language tweaks

Overview

The administration language should be applied on:

• backend

  • all paths having the option _admin_route
  • node/*/edit pages
  • TODO: list other elements which should use administration language

• frontend

  • contextual links
  • admin toolbar
  • TODO: list other elements which should use administration language

Setup

1. You may need to apply to following patches.

   "extra": {
      "patches": {
        "drupal/core": {
          "Language negotiaton fix": "https://www.drupal.org/files/issues/2189267-53.patch",
          "Account administration pages' language negotiation causes 'access denied' in toolbar subtree caching": "https://www.drupal.org/files/issues/2868193-10.patch",
          "Admin toolbar should always be rendered in the admin language": "https://www.drupal.org/files/issues/2313309-40.patch"
        }
      }
   }
   

2. Configurations:

   2.1. Configure the language detection /admin/config/regional/language/detection

   Interface text language detection:

   1. Administration language
   2. URL
   

   Content language detection:

   1. URL
   

   2.2. Configure the administration language /admin/config/regional/language/detection/administration_language

   PATHS

   • add path /contextual/render for contextual links, the path is loaded via ajax by calling "/contextual/render"

     Hint: The contextual links are cached via the browser Session Storage, clear all Drupal.contextual.*

   ADMIN ROUTES

   • Enable to automatically apply on routes with option _admin_route