Spanish/Double Keyboard

Keyboard behavior and usage notes for Spanish keyboard language and double keyboards.

Video
References
  1. US-International Layout: [LINK]
  2. Microsoft UX guidance warns against Ctrl+Alt shortcuts because Windows interpret Ctrl+Alt as AltGr: [LINK]
  3. Raymond Chen explains Ctrl+Alt / AltGr: [LINK]
  4. Win32 key message behavior, `WM_KEYDOWN`: [LINK]
  5. Keyboard input overview: [LINK]
  6. AltGr wiki: [LINK]