Café crema was the original name for espresso because of the crema it produced. Café crème is the French translation. Espresso became the more popular word.
Now it's when you make a long black / americano style drink but instead of adding water before / after pulling the shot, you run the full amount of water through a coarser grind when making the espresso.
Americano = water after shot
Long black = water before shot
Café crema = water through shot