Issue #2246665 by jaredsmith, martin107, YesCT, filijonka, tstoeckler: Typehint with Drupal\Core\Language\LanguageInterface instead Drupal\Core\Language\Language.

Issue #2105557 by Berdir, dawehner: Add an admin_permission to EntityType annotations to provide simple default access handling.

Issue #2003592 by andypost, mhagedon, webflo: Convert language_admin_add_form() and language_admin_edit_form() to a Controllers.

Issue #2005778 by webflo, naxoc, penyaskito, andypost, vijaycs85, plopesc, maggo: Convert language_admin_overview_form() to a Controller.

Issue #2031115 by tim.plunkett: Fixed Language::LANGUAGE_DEFAULT should be Language::LANGCODE_DEFAULT.

Issue #1995048 by twistor, tim.plunkett, damiankloip, Berdir: EntityListController::getOperations() should respect access checks.