Originally Posted by NW-Bound
It's a inborn natural ability that training will improve but cannot create.
Certainly it is unlikely that this little girl speaks Italian!
As to training cannot create this ability, likely not with absolutely no ear or musical ability or rhythm, but otherwise this isn't quite true.
My ex-wife, who is a voice coach and chorus director, has taught many different students to sing in French, Italian, German, and Russian. She herself is fluent only in French and Italian and German. When she wants to teach a Russian song, she gets a lesson or two from a Russian on the specific song she wishes to teach. Likely anyone with a good musical ear and music training can be taught songs in a very good singing accent in most any language by a skillful teacher. In a way, it is easier to sing a song in a foreign language than to speak that language. It's like poetry, it has a rightness about it and the rhythm and emotional depth of it aids you. Also it is memorized, you don't have to generate the words and sentences, you just sing what you have been taught.
As I try to resurrect my Spanish speaking ability, the easiest part is singing the folk songs and popular songs that I learned many years ago in SA. YouTube is a huge aid here also. The hard part (for me) is remembering old vocabulary, and learning new or totally forgotten words, and regaining facility in constructing grammatical sentences.