Reading the referers of this website, I found that someone reached it querying a search engine for
Italian songs that are in English too
Strictly speaking, they were looking for something that, in the context of computing, is known as a polyglot.
I’m sorry but this is over my head: I can only think about something slightly different… for example, the song “Fragile” (written by Sting) that is an English song whose title has the same spelling and meaning in both Italian and English.

If a polyglot lyric is a song written in multiple languages, I think “Fou de love” (written by Angelo Branduardi) could be a good example.
Have a look:
http://www.geocities.com/Vienna/6016/domenica.html
http://www.branduardi.org/it/5575Dett.htm
Bye
Paolo
Paolo: thanks… but a polyglot program is “written in a valid form of multiple programming languages” so a polyglot lyric should have words or sentences that are valid in multiple languages. As I’ve written, I can’t find an example.
I know you’re right. But this is an Italian song written in multiple languages. Maybe, non strictly speaking, this song is the same in English.