Issue #1810394 by hchonov, plach, YesCT, David Hernández, Schnitzel, vijaycs85, penyaskito, tstoeckler, alexpott, Gábor Hojtsy: Site configuration with domain based language negotiation results in redirecting authenticated users to a different domain when accessing a content entity route for translation language different from the interface language

Issue #2102477 by alexpott: Convert remainder of language negotiation settings to configuration system.

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 #1827038 by japicoder, Albert Volkman, dawehner, vijaycs85, penyaskito, tim.plunkett, catch: Remove stale references to language_content_type() variable.

Issue #1969572 by neclimdul, larowlan, hussainweb, dawehner, damiankloip, ParisLiakos, pwieck, Berdir, socketwench: Make Uuid a service.

Issue #1199946 by alexpott, fubhy, bojanz, steinmb, chx, catch: Fixed Disabled modules are broken beyond repair so the 'disable' functionality needs to be removed.

Issue #1856976 by andypost, Soul88, ACF, aspilicious, vijaycs85, dawehner: Convert language_count() to the state system.

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 #1714462 by n3or, sun, Gábor Hojtsy: Convert language negotiation settings to configuration system.

Issue #1280996 by tarmstrong, vasi1186, fastangel, dawehner, tobiasb: New language_select() element type for form API.

Issue #1637710 by Schnitzel, vasi1186: Fixed Pass on language weight to language_locked_languages() when available.

Issue #1471432 by Gábor Hojtsy, vasi1186, tobiasb, kalman.hosszu, Schnitzel, nod_, pixelite, dawehner: Rework language_list(), let people use more special languages.

- Patch  #1468930 by dawehner, Gábor Hojtsy, plach, das-peter, fubhy: clean up and move the code for the negotiation functionality from locale module to language module.

- Patch #1357918 by Gábor Hojtsy, swentel, sun, no_commit_credit: missing update for language_default() in language langcode update.

Issue #1301040 by Gábor Hojtsy: Move language listing functionality from locale.module to a new language.module.