O' Fortuna, The song is in Latin, but this is what I hear.

O Fortuna
"O Fortuna" is a medieval Latin Goliardic poem that is part of the collection known as the Carmina Burana, written early in the 13th century. It is a complaint about Fortuna, the inexorable fate that rules both gods and mortals in Roman and Greek mythology.

This song is in Latin, I don't speak Latin, but this is what I hear when I listen to this song.