UI Events API:
https://hacks.mozilla.org/2017/03/internationalize-your-keyboard-controls/
https://caniuse.com/#feat=keyboardevent-code
Semantics and focus:
http://codepen.io/matuzo/pen/xgwxNw
http://codepen.io/matuzo/pen/EmKrZq
http://codepen.io/matuzo/pen/YNyPMj
http://codepen.io/matuzo/pen/BpQreX
http://codepen.io/matuzo/pen/pRNVJN
http://codepen.io/matuzo/pen/GrNdvK
Lang attribute:
https://www.youtube.com/watch?v=ox5QVbZSPBk
Microsoft Inclusive Design
https://download.microsoft.com/download/B/0/D/B0D4BF87-09CE-4417-8F28-D60703D672ED/INCLUSIVE_TOOLKIT_MANUAL_FINAL.pdf