Well, here's Nana Mouskouri singing "White Rose of Athens" in English:
https://www.youtube.com/watch?v=R5-6UQD4wL8


THE WHITE ROSE OF ATHENS
(Norman Newell / Manos Hadjidakis / Archie Bleyer)

'Til the white rose blooms again
You must leave me, leave me lonely
So goodbye my love 'til then
'Til the white rose blooms again

The summer days are ending in the valley
And soon the time will come when we must be apart
But like the rose that comes back with the spring time
You will return to me when spring time comes around

'Til the white rose blooms again
You must leave me, leave me lonely
So goodbye my love 'til then
'Til the white rose blooms again
'Til the white rose blooms again
You must leave me, leave me lonely

So goodbye my love 'til then
'Til the white rose blooms again
Goodbye 'til then
Goodbye 'till then
Goodbye 'til then

Source: Musixmatch
Songwriters: Norman Newell / Manos Hadjidakis / Archie Bleyer
The White Rose of Athens lyrics © Kassner Associated Publishers Ltd., Edward Kassner Music Co. Ltd, Edition Ed Kassner Musikverlag, Kassner Ed Co Musikverlag

From https://en.wikipedia.org/wiki/Nana_Mouskouri
Mouskouri became well known throughout Europe for the song "The White Rose of Athens", recorded first in German as "Weiße Rosen aus Athen" as an adaptation of her Greek song (San sfyríxeis tris forés, "When you whistle three times"). It became her first record to sell over one million copies.