The premium keyboard for Elite x2 G8 is a QWERTZ keyboard with Swiss variant, but it is indicated as "Germany" for the layout in some sources, which corresponds more to a German QWERTZ keyboard. None of the sources explicitly state that this is a French-speaking Swiss QWERTZ keyboard with the "é", "ö", "è" accents typical of French-speaking Swiss. The keyboard is indeed intended for the Swiss market (country variant: Switzerland), but it seems to correspond to the German QWERTZ layout, not specifically to the French-speaking Swiss variant with French accents.

No, it looks exactly the same, the connectors are also identical, but the magnet that connects it is attached differently, no chance of attaching it to a G4