Looks like the translation is "sector coupling" or "integrated energy", but I think the real key in translating this is that we typically use a different framing in English.

German "Sektorenkopplung": We're explicitly unifying all sectors to a single source of energy, and it's implicit that this source is electricity.

English "electrification": We're explicitly switching sectors to electricity, and it's implicit that this will ultimately tie every sector to a single source of energy.

Disclaimer: I don't speak German.