November 20, 2019 Patch

{{Patch layout
 * source = http://www.thinkwithportals.com/blog.php?id=54799
 * source-title = Portal 2 - Update
 * before   = October 1, 2019 Patch
 * current  = November 20, 2019 Patch
 * after    = May 01, 2020 Patch
 * notes = === Windows ===
 * Fixed an issue where in-game audio caption language would use the system language setting instead of the Steam language setting.

Controller support
}}
 * Improved camera control through Steam Input – the sensitivity scale has changed so you may need to increase your configuration’s sensitivity.
 * Add local coop support for one controller player and one Mouse/Keyboard player.
 * Add local coop support from the community coop map queue. Quickplay is still not supported.
 * Fix XInput related options being hidden when connecting a Steam Input enabled controller using a Gamepad configuration.
 * Fix the challenge mode screen not having enough footer buttons available through Steam Input.
 * Fix several more bugs where the incorrect action set could be set in Steam Input.
 * Fix several cases where having a controller connected but not active would affect the glyphs and settings screen options.