"Are they drinking coffee?"
Translation:Boivent-ils du café ?
No, that is almost true in German though, with Sie / sie meaning you [formal] / they.
In French "vous" exclusively means you, either formal-singular or plural. "Ils" and "Elles" are the only ways of saying they.
"Ils" = they for masculine / mixed company "Elles" = they for a group of all feminine