What was the language of sign above Christ on cross?

The sign above Jesus on the cross was written in three languages: Latin, Greek, and Hebrew.

Latin: INRI (Iesus Nazarenus Rex Iudaeorum) meaning "Jesus of Nazareth, King of the Jews"

Greek: Ἰησοῦς ὁ Ναζωραῖος ὁ Βασιλεὺς τῶν Ἰουδαίων (Iēsous ho Nazōraios ho Basileus tōn Ioudaion) meaning "Jesus the Nazarene, the King of the Jews"

Hebrew: יֵשׁוּעַ הַנָּצְרִי מֶלֶךְ הַיְּהוּדִים (Yeshua HaNotzri Melech HaYehudim) meaning "Jesus the Nazarene, King of the Jews"

This was done to communicate the message to the largest possible audience, as these were the three most common languages in Jerusalem at the time.