Issue #2585821 by blazey, marvin_B8, sdstyles, benelori, GoZ, DuaelFr: ConfigurableLanguageManager language_switch_links alter use undefined path variable

Issue #2668008 by dimaro, kannan@kiluvai.com, rakesh.gectcr, felribeiro, jhodgdon, eojthebrave, xjm, mobaid: Internationalization topic refers to format_plural() function that does not exist

Issue #2668008 by dimaro, rakesh.gectcr, kannan@kiluvai.com, felribeiro, jhodgdon, eojthebrave, mobaid, xjm, AjitS: Internationalization topic refers to format_plural() function that does not exist

Issue #2410497 by alvar0hurtad0, sdstyles, hussainweb, webchick, jhodgdon, mpdonadio: Update remaining url() and _l() calls in comments/documentation

Issue #2401843 by lahoosascoots, jhodgdon: Move all *.api.php files except system.api.php out of system module directory

Issue #2460823 by jhodgdon: Document that locale + config translation integration treats string uniqueness the same way as locale itself

Issue #2340667 by YesCT, Pedro Lozano, alexpott, martin107: Protect Drupal\Core\Language\Language::id, and use getId().

Issue #2343661 by larowlan, tim.plunkett | xjm: Rename l() to _l() and url() to _url(), and document replacements.

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

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

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 #2019055 by plach, fago, berdir, yched, Gábor Hojtsy, kfritsche, jibran: Switch from field-level language fallback to entity-level language fallback.

Revert "Issue #2019055 by plach, fago, kfritsche: Switch from field-level language fallback to entity-level language fallback."

This reverts commit 46942cd3.

Issue #2019055 by plach, fago, kfritsche: Switch from field-level language fallback to entity-level language fallback.

Issue #1961542 by mtift, ParisLiakos: Added Drupal::transliteration() and replace calls to transliteration service with it.

Issue #1833022 by e0ipso, plach, YesCT, kfritsche, penyaskito, vijaycs85, nod_, cam8001: Only display interface language detection options to customize more granularity.

Issue #1754246 by webflo, swentel, penyaskito, andypost, alexpott, YesCT, dagmar: Languages should be configuration entities.

Issue #1988508 by katbailey: Stop pretending we support Symfony bundles when we really just have service providers.

Issue #1620010 by dawehner, ParisLiakos, plach, jibran: Move LANGUAGE constants to the Language class.

Issue #1899994 by katbailey, plach, YesCT: Disentangle language initialization from path resolution.

Using the language_manager wrapper function to return a language whether or not we're in the requet scope

Issue #1496542 by cosmicdreams, sun, chx, vasi1186, aspilicious, alexpott, nadavoid, Pedro Lozano, disasm, andypost | heyrocker: Convert site information to config system.

- Patch #1510686 by cosmicdreams, vasi1186, webflo, disasm: replace remaining references to global () with drupal_container().

- Patch #1497230 by Rob Loach, pdrake, effulgentsia: Use Dependency Injection to handle object definitions.

- Patch #1222106 by Gábor Hojtsy, plach, xjm: Unify language negotiation APIs, declutter terminology.

- Patch #1416392 by Gábor Hojtsy, plach, rvilar: clean up language (types) bootstrap function naming and documentation.

Issue #1430986 by Gábor Hojtsy, plach: Clean up naming for language negotiation configuration functions/paths.