'Le temps des Cerises' is a very old French classic (written in the 1860s by Antoine Renard). Here is Nana Mouskouri doing an acapella version -
http://www.youtube.com/watch?v=GrgFYB4ij_k
Elvis recorded using this music (more or less), I think it was like 'Love Me Tender' in that it was just his voice and an acoustic guitar - though I might be remembering wrong. Might have sung it in a film, also not sure.
I don't think the words were a translation from the French, but rather new words entirely. I'm very much hoping some Elvis fan out there could listen to the French version and tell me the title of Elvis's version. The first 4 or 5 bars are VERY distinctive and might be enough to nail it. My French friend is burying her daughter on Wednesday and has just discovered she loved this song, but can't find it in her daughter's collection. I'm all search-engined out trying to find it for her, but without at least a line, or the title, I've had no success. Many, many thanks in advance for any help you can give.