Questions about Magic Keyboard

Of course Apple keyboards can also be used on a PC, they are only USB devices. Windows doesn't really care if it says Apple on it.

It has a non-removable battery that is charged with the supplied cable (Ligthning cable, the same as for the iPhone).
You can also use...

I write in English using a Swiss keyboard layout. It is no problems. And, obviously, no problems to write in German using the Swiss keyboard layout....

Scissor mechanism. As far as I know, the external keyboards always had the scissor mechanism.

Yes, these Apple products are simply recharged via USB. This has the advantage that you can continue to work with the keyboard via cable when the battery...

The Magic Keyboard has a built-in rechargeable battery and lasts a month or more before you need to charge it.
It comes with a Lightning...

This works well via Bluetooth.

If it is really dry: plug it in to charge and try it. If it doesn't work after three days, then I can only give a bad prognosis: The keyboard is probably...