4 “And Pilate wrote a title also, and put it on the cross, and the writing was, Jesus of Nazareth, the King of the Jews. This title then read many of the Jews: for the place where Jesus was crucified was near to the city: and it was written in Hebrew, Greek, and Latin, The King of the Jews.” For these three languages were conspicuous in that place beyond all others: the Hebrew on account of the Jews, who gloried in the law of God; the Greek, because of the wise men among the Gentiles; and the Latin, on account of the Romans, who at that very time were exercising sovereign power over many and almost all countries.
Source: Tractates on the Gospel of John (New Advent)