Languages of the Mass

The Church regards three languages as sacred, namely Hebrew, Greek, and Latin. All three of these languages are present in the Mass of the Ages.

Kyrie Eleison is Greek, as well as the Trisagion (Agios o Theos) as used on Good Friday.

Hosannah, Sabaoth, Alleluia, Amen, Seraphim, Cherubim are examples of the use of Hebrew.

This list of languages can be found in several places in Sacred Scripture:

Luke 23:38 And there was also a superscription written over him in letters of Greek, and Latin, and Hebrew: THIS IS THE KING OF THE JEWS.

John 19:19 And Pilate wrote a title also, and he put it upon the cross. And the writing was: JESUS OF NAZARETH, THE KING OF THE JEWS. This title therefore many of the Jews did read: because the place where Jesus was crucified was nigh to the city: and it was written in Hebrew, in Greek, and in Latin.

Apocalypse 9:11 A king, the angel of the bottomless pit; whose name in Hebrew is Abaddon, and in Greek Apollyon; in Latin Exterminans, One woe is past, and behold there come yet two woes more hereafter. And the sixth angel sounded the trumpet: and I heard a voice from the four horns of the great altar, which is before the eyes of God,

Each of these languages were fixed to the cross of Christ on Calvary, and were thereby sanctified for liturgical use by His blood.