Внимание читающих по-итальянски - это неаполитанская песня, соответственно здесь используется неаполитанский диалект.

Neapolitan Italian Text

Che bella cosa na jurnata 'e sole,
n'aria serena doppo na tempesta!
Pe' ll'aria fresca pare già na festa...
Che bella cosa na jurnata 'e sole.

Ma n'atu sole
cchiù bello, oje ne'.
O sole mio
sta 'nfronte a te!
O sole
O sole mio
sta 'nfronte a te!
sta 'nfronte a te!

Quanno fa notte e 'o sole se ne scenne,
me vene quase 'na malincunia;
sotto 'a fenesta toia restarria
quanno fa notte e 'o sole se ne scenne.

Ma n'atu sole
cchiù bello, oje ne'.
O sole mio
sta 'nfronte a te!
O sole
O sole mio
sta 'nfronte a te!
sta 'nfronte a te!

English Translation

What a wonderful thing a sunny day
The serene air after a thunderstorm
The fresh air, and a party is already going on…
What a wonderful thing a sunny day.

But another sun,
that’s brighter still
It’s my own sun
that’s in your face!
The sun, my own sun
It’s in your face!
It’s in your face!

When [bad word] and the sun has gone down,
I start feeling blue;
I’d stay below your window
When [bad word] and the sun has gone down.

But another sun,
that’s brighter still
It’s my own sun
that’s in your face!
The sun, my own sun
It’s in your face!
It’s in your face!