Well I recently found the French lyrics from the end of Joanni (a song on Aerial, her latest album):

Elle parle à Dieu et aux anges dans ses prières
Venez Sainte Catherine et Sainte Marguerite,
Elle a besoin de vous deux.
Ah les voix, les voix du feu,
Chante avec moi petite soeur,
J’entends les voix, les voix.

From this site (in French)

And here’s the translation (by me!)

She speaks to God and the angles angels in her prayers
Come St. Catherine and St. Margaret,
She needs you two,
Ah the voices, the voices of fire,
Sing with me, little sister,
I hear the voices, the voices.

And no, I didn’t read the English translation, I translated this all by myself!