"Marcho di Rei" is in Provençal, to be exact. The standard French version is "Marche de Rois," "translated" by J.F. Domergue (1759). It was also known as M'sieu d'Turenne. The song in French is performed by Le Lyçée Français de Los Angeles Children's Choir HERE. On Bizet's Farandole, CLICK HERE, and HERE (first page of the orchestra score).

~Masato