"The Loveliest Night of the Year" is *not* singable TTTO "Blue Danube". However, the latter, in my childhood did have some rather insipid English words, of which I remember the following fragments:

River so blue,
Of marvelous hue,
. . .
. . .
You open my eyes
To ... paradise,
Alive is my soul,
Is my soul,
To my heart the spring has come.