Issue #2102125 by dawehner, tim.plunkett, neclimdul, pwolanin, YesCT, damiankloip, Tim Bozeman: Big Local Task Conversion.

Issue #1998088 by ParisLiakos, alexpott, ebrowet, plopesc, dawehner, Gábor Hojtsy: Convert locale_translate_english variable to CMI.

Issue #2049207 by dlu, blakehall, janstoeckler, ramlev, Moderate | Cottser: Replace .tpl.php with .html.twig in documentation.

Issue #2002650 by mrsinguyen, chertzog, legolasbo, Erik Erskine, rhm50, sandergo90, grisendo, targoo, janstoeckler, maximpodorov, beowulf1416: Improve maintainability by removing unused local variables.

Issue #1981368 by tim.plunkett, Crell, webchick: Convert all routes to 'module_name().foo_bar()' naming convention.

Issue #2003592 by andypost, mhagedon, webflo: Convert language_admin_add_form() and language_admin_edit_form() to a Controllers.

Issue #1978916 by likin, YesCT, disasm, ayelet_Cr, tim.plunkett, vijaycs85, Letharion: Convert locale_translate_page() to a Controller.

Issue #2035721 by Wim Leers, Gábor Hojtsy: Figure out how to translate Drupal-specific CKEditor plugins.

Issue #2009654 by Cottser, InternetDevels, jesse.d, Carolyn, jenlampton: Replace theme() with drupal_render() in locale module.

This reverts commit 8ce27f22.

Issue #1978928 by piyuesh23, InternetDevels, disasm: Convert locale_translation_manual_status() to a Controller.

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

Issue #1887480 by Sutharsan, webflo: Fixed Automated download of translations when adding languages/enabling modules can not be disabled.

Issue #1998056 by Sutharsan, clemens.tolboom, penyaskito: Automatically update interface translations using cron.

Issue #1861934 by Kristen Pol, pixelite, YesCT, Sutharsan, Outi: Rework help text for UI translations and importing po files.

Issue #1898428 by joelpittet, shanethehat, Floydm, gillbates, steinmb, artis, Cottser, gnuget: locale.module - Convert theme_ functions to Twig.

Issue #1813762 by ParisLiakos, Jose Reyero, YesCT, japicoder, attiks: Introduce unified interfaces, use dependency injection for interface translation.

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

Issue #1898432 by WebDevDude, steveoliver, vlad.dancer, jenlampton, pixelmord, Fabianx, iztok, EVIIILJ, jwilson3, c4rl, Cottser: Convert node module to Twig.

Issue #1905152 by Gábor Hojtsy, Jose Reyero, vijaycs85, YesCT, penyaskito: Integrate config schema with locale, so shipped configuration is translated.

Issue #1864066 by sun, andypost, tim.plunkett: Simplify hook_menu_local_tasks() and MENU_DEFAULT_LOCAL_TASK usage.

Issue #1751348 by heyrocker, vijaycs85, julien, Gábor Hojtsy: Convert locale settings to configuration system.

Issue #1496480 by mrf, disasm, kbasarab, pfrenssen, cam8001, typhonius, Letharion, ACF, vijaycs85, heyrocker, Berdir, alexpott: Convert file system settings to the new configuration system.

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

Issue #1884182 by Gábor Hojtsy, Sutharsan: Fixed Import of large number of translations fails on SQLite.

Issue #1804702 by Sutharsan, balintk, YesCT, Jose Reyero, Gábor Hojtsy: Display interface translation status.

Issue #1864472 by Sutharsan: Warning when tries to delete English after non-English install, locale_translation_status_delete_languages().

Issue #1804688 by Sutharsan, YesCT, clemens.tolboom, Gábor Hojtsy, webflo, Jose Reyero: Download and import interface translations.