Having all these different lyrics is good and all...
You know what would be really nice?
I have a vocal book, "Pavarotti Forever". It has this song in it.
It doesn't have how to pronounce it.
And NEITHER DOES THE INTERNET. I look up pronunciation of the song, nothing, I look up the song on youtube at fifty percent speed to make it translatable, nothing. I look up the language of Neapolitan, to hopefully find pronunciation. NOTHING.