Issue #2827784 by maxocub, faline, cebasqueira, juancasantito, tstoeckler, Wim Leers, alexpott: LanguageSelectWidget should have options for which language types to show

Issue #2791727 by bhide.nishad, chishah92, tresti88, Chi: Wrong links in tours (eg. Language and Locale)

Issue #2473947 by Cottser, davidhernandez, rachel_norfolk, rteijeiro, cilefen, alimac, akalata, YesCT, mortendk: Prefix form-item-* classes with js-

Issue #2470307 by Mark_L6n, eiriksm, Gábor Hojtsy: Modifying path prefix for URL language detection causes error message for default language

Issue #2459971 by Gábor Hojtsy: The langcode key on configuration files is not explicit in configuration schema

Issue #2090115 by alexpott, xjm: Don't install a module when its default configuration has unmet dependencies

Issue #2017471 by rodrigoaguilera, balagan, clemens.tolboom, Kristen Pol, Outi, rpayanm, danylevskyi, mon_franco, Antti J. Salminen, aloyr, thlafon, Marc Hannaford, kreatIL, oussema, David Hernández: Multilingual tour for language section

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

Issue #2070737 by herom, EllaTheHarpy, alexpott: Change values of LanguageInterface::DIRECTION_(LTR/RTL) to ('ltr'/'rtl').

Issue #2301045 by Gábor Hojtsy: Fixed Standard profile has views which include elements dependent on uninstalled modules, not valid in config.

Issue #2256679 by alexpott, tim.plunkett: Fixed Use config schema to determine which config entity properties to export regardless of whether they are public or protected.

Issue #2283929 by tim.plunkett: Clean up condition plugins to have schema support and to allow them to be optional.

Issue #2096699 by vijaycs85 | tstoeckler: Fixed Missing config schema for language.negotiation.selected_langcode.

Issue #2268975 by Gábor Hojtsy, vijaycs85: Fixed named schema elements missing when installing Drupal.

Issue #2233787 by alexpott, xjm | tim.plunkett: Move default configuration into extension/config/install to clarify its purpose.

Issue #2167623 by danilenko_dn, sidharthap, Nitesh Sethia, krishnan.n, aitiba, alexpott, ashwinikumar, Barrett, damiankloip, deepakaryan1988, foxtrotcharlie, ianthomas_uk, neetu morwani, nonsie, piyuesh23, Sharique, sivaji, sushantpaste, swentel, vijaycs85, YesCT: Add test for all default configuration to ensure schema exists and is correct.

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 #2137599 by segi, Sweetchuck: Incorrect type and default value for the direction of the default language.

Issue #1653026 by damiankloip, alexpott, sun, tim.plunkett, dawehner, mtift: Fixed All configuration values are stored as strings.

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

Issue #1942144 by sandipmkhairnar: Fixed Make Language module active config save format match the default yml file.

Issue #1919178 by vijaycs85, YesCT, sandipmkhairnar: Create configuration schemas for language module.

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

Issue #365615 by attiks, smokris, penyaskito, Gábor Hojtsy, Bojhan, WormFood, yang_yi_cn: Fixed Language detection not working correctly for most Chinese readers.