Issue #3210684 by joachim, mikran, tobiasb: Put each entity type table into a details element on admin/config/regional/content-language

Issue #2607824 by Nitesh Pawar, r_sharma08: Asterisks in language-negotiation-configure-form.html.twig's docblock don't line up

Issue #1938912 by Manuel Garcia, joelpittet, lokapujya, duellj, Cottser, akalata, pplantinga, mdrummond, rpayanm, Hydra, lauriii: Convert language content setting table theme to a twig template

Issue #2473945 by Cottser, rachel_norfolk, axe312, davidhernandez, yannickoo, emma.maria, cilefen, akalata, jaxxed, LewisNyman: Prefix form-item classes with js-

Issue #2329847 by tuutti, rachel_norfolk, Cottser | davidhernandez: Use Attribute to replace hard coded classes in language-negotiation-configure-form.html.twig.

Issue #1898422 by joelpittet, lokapujya, Salah Messaoud, stevector, Les Lim, pplantinga, jenlampton, drupalninja99, tlattimore, johannez | c4rl: Language.module - Convert theme_ functions to Twig.