Issue #2149649 by Gábor Hojtsy, YesCT, Xano, herom, vijaycs85, Sweetchuck, plach: Entity rendering/theming does not use the active entity language to render links.
Issue #2220749 by gremy, Berdir, jessebeach: Limit $extension.$(config_prefix/entity_id) combo value to 83 characters (82 plus a '.') as part of a 250 character limit on config entity file names.