Here's a very different English rendering of the song:

MARIANINA

Where the Tuscan sun is warm and bright,
Dwells a maid whose laugh is pure delight;
Though her charm is yet unknown to fame,
Still I love her just the same

CHORUS
Marianina, tra-la-la, Marianina, tra-la-la,
Oh Marianina! Oh Marianina
The wild red rose was never half so fair.
Oh Marianina Oh Marianina
My Tuscan belle with poppies in her hair.

When the air is filled with perfume rare
From the flowers blooming everywhere,
She, with laughing eyes and dancing feet,
Joyously the day doth greet.

I have loved her ever since we met,
She is mine, but doesn't know it yet;
I shall tell her so tomorrow day,
She will never answer nay.


Source: IOCA Song Fest, edited by Dick and Beth Best, page 86, 1948 edition