Also, the Collected Papers of Albert Einstein, published by Princeton University Press, notes that Einstein spoke Italian. Of course, Einstein had lived in Italy during his youth, and Einstein's father is buried in Milan. Further, in order for Einstein to gain Swiss citizenship (a requirement for him to work in the Berne patent office since that was a government job) it could only help him if he could show proficiency in Italian, which, along with German and French, is one of the three official languages of Switzerland. Finally, there are still extant postcards written by Einstein in Italian as well as living Italians who spoke to Einstein in his later years who can attest to his fluency. There is no doubt that Einstein spoke Italian well.