Issue #2419649 by plach, David Latapie: Content translation schema updates are not triggered consistently

Issue #2397729 by penyaskito, Gábor Hojtsy, plach, Kristen Pol: Content language settings cannot be configured for non-translatable types on the one page configuration form

Issue #1916790 by plach, YesCT, penyaskito, Gábor Hojtsy, das-peter, herom, larowlan: Convert translation metadata into regular entity fields

Revert "Issue #1916790 by plach, YesCT, penyaskito, Gábor Hojtsy, das-peter, herom, larowlan: Convert translation metadata into regular entity fields"

This reverts commit 920382d4.

Issue #1916790 by plach, YesCT, penyaskito, Gábor Hojtsy, das-peter, herom, larowlan: Convert translation metadata into regular entity fields

Issue #2355909 by penyaskito, alexpott, Gábor Hojtsy, DuaelFr: language.settings config is not scalable

Issue #2378095 by Wim Leers, Devin Carlson: Convert all remaining attached individual CSS/JS assets to attached asset libraries

Issue #2341341 by YesCT, martin107, vijaycs85, fran seva: Change public 'name' property access on languages to getName() and add back setName().

Issue #2312093 by alexpott, yched, andypost, swentel | xjm: Rename FieldInstanceConfig to FieldConfig.

Issue #2320037 by Gábor Hojtsy: Fixed Non-fieldable entities (with only base fields) cannot be configured translatable, eg. shortcuts.

Issue #2224761 by Gábor Hojtsy, alexpott, pfrenssen, effulgentsia, xjm, mlncn: Add a generic way to add third party configuration on configuration entities and implement for field configuration.

Issue #2283977 by alexpott, Gábor Hojtsy, effulgentsia, fago: Create a new ConfigEntity type for storing bundle-specific customizations of base fields.

Issue #2061977 by InternetDevels, kim.pepper, ianthomas_uk, herom, rhm50, naveenvalecha, andypost,  mandar.harkare, sergeypavlenko, sidharthap, SIz, tkuldeep17: Replace user_access() calls with ->hasPermission() in all core modules except user.

Revert "Issue #2061977 by InternetDevels, kim.pepper, ianthomas_uk, herom: Replace user_access() calls with ->hasPermission() in all core modules except user."

Fixing commit credit.

This reverts commit 25afa810.

Issue #2061977 by InternetDevels, kim.pepper, ianthomas_uk, herom: Replace user_access() calls with ->hasPermission() in all core modules except user.

Issue #2143291 by plach, alexpott, xjm, effulgentsia, pwolanin, swentel | yched: Clarify handling of field translatability.

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

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

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

Issue #2196825 by kirby14: Convert all calls & docs references to check_plain() in core to Drupal\Component\Utility\String::checkPlain() in content_translation module.

Issue #2165155 by Berdir, tim.plunkett: Change $entity_type to $entity_type_id and $entity_info to $entity_type/$entity_types.

Issue #1862202 by plach, Berdir, katbailey, ParisLiakos, alexpott, chx, sun, larowlan, Gábor Hojtsy, cosmicdreams, vijaycs85, YesCT, penyaskito, andypost, Albert Volkman, joelpitett: Objectify the language system.

Issue #2005716 by tim.plunkett, msonnabaum, dawehner, alexpott, effulgentsia: Promote EntityType to a domain object.

Issue #2081151 by Tim Bozeman, deneo, Pete B: Remove Unused local variables from the content_translation module.

Issue #2076445 by plach, andypost, yched, Gábor Hojtsy: Make sure language codes for original field values always match entity language regardless of field translatability.