Check translation on the above. It seems like some kind of song, perhaps a French song, but I wasn't able to find anything with Google.
I listened to the song at the end of episode 1 of The Final Chapter (Chanson de l'oignon), and although it doesn't match the French subtitles given for that song, it might be how a Japanese person would interpret them. Kind of like how "U-U-Uwa uwa" in carmeldansen became "U-U-Uma uma".