triple, dreifach, triplo, тройной, triplíquese, tripler, triplicare, Verdrievoudig, tredobbelt...ok, now I'M confused...what language is "tripel" anyway?
and yes, the name is more about the style and not the alcohol gravity. a quadrupel isn't really a name for any style. "Belgian Dark Strong Ale" is a style, tho (and very tasty)
bjcp calls a triple a tripel