Because the word is german indeed. Ferrero has an long history in using foreign words in their product names. E.g. Mon Cheri chocolate in 1956 Nutella in 19

Because the word is german indeed. Ferrero has an long history in using foreign words in their product names. E.g. Mon Cheri chocolate in 1956 Nutella in 1964 ("nut" also not an italian word, which would be "nocciola")