Yes, all three methods are backward compatible with Windows 11 as well.
If you own a rare replica USB keyboard (e.g., from a custom maker), it will work as a standard HID device – but you still need the software layout from Method 3 above. Monotype Keyboard Free Download For Windows 10
Yes, it is open-source and distributed free of charge. No credit card or subscription required. Yes, all three methods are backward compatible with