Issue #2238651 by chx: LocaleStringTest is incorrectly asserting source strings instead of translations.

Issue #2089433 by ianthomas_uk, grom358, herom, thedavidmeister, visabhishek, longwave, Sweetchuck: Remove uses of deprecated XSS filter functions.

Issue #2166915 by ianthomas_uk, sun | plach: Remove uses of deprecated language functions in tests and procedural code.

Issue #2121175 by Codenator, tim.plunkett, cosmicdreams, jayeshanandani, grom358, ianthomas_uk, Xano: Remove usage of drupal_get_form().

Issue #2149649 by Gábor Hojtsy, YesCT, Xano, herom, vijaycs85, Sweetchuck, plach: Entity rendering/theming does not use the active entity language to render links.

Issue #2226903 by pwolanin, dawehner, tvn, martin107, jessebeach: Step 1: Move static menu links to yml files.

Issue #2122175 by dclavain, SiliconMind, tim.plunkett, YesCT: String translation does not honor language fallback.

Issue #2224691 by Sweetchuck: JavaScript Drupal.t and Drupal.formatPlural only works for non-english languages.

Issue #2223249 by alexpott: Remove hook_language_insert/update/delete/presave in favour of entity hooks.

Issue #2219499 by Berdir, alexpott, Gábor Hojtsy, vijaycs85, swentel: Generalize language config override responsibility.

Issue #2178725 by pwolanin, crowdcg, effulgentsia, Sutharsan: Make all core menu link machine names and the corresponding route names match.

Issue #1316692 by tim.plunkett, dawehner: Convert hook_admin_paths() into declarative properties on routes.

Issue #2080823 by alexpott, swentel, Wim Leers: Create API to discover content or config entities' soft dependencies and use this to present a confirm form on module uninstall.

Issue #2171071 by jessebeach, dawehner, chakrapani, longwave, Gábor Hojtsy, xjm, Wim Leers: Rename drupal_add_library() to _drupal_add_library() and remove its uses.

Issue #2210197 by sun, longwave, Sutharsan: Remove public access to Extension::$type, ::$name, ::$filename.

Issue #1978924 by tim.plunkett, ParisLiakos, disasm, Luxian, vijaycs85, YesCT, vaibhavjain, Pancho: Convert locale_translate_export_form to a Controller.

Issue #2203407 by nod_, sun: Replace #attached library array values with provider-namespaced strings.

Revert "Issue #2210197 by sun, longwave: Remove public access to Extension::$type, ::$name, ::$filename." Broke 'drush en simpletest' on testbots

This reverts commit 2c51074d.

Issue #2202143 by alexpott, benjy: Multiple calls to ConfigFactory::get() inside t() is unnecessary.

This reverts commit ae8be3cc.

Issue #2070369 by herom, bdgreen, Mac_Weber, InternetDevels, sidharthap, JeroenT: Remove all calls to deprecated function language().