Translation music again

On Exploring Music with Bill McGlaughlin tonight he played both the French and English versions of "Les feuilles mortes" / "Autumn Leaves" by Joseph Kosma and Jacques Prévert (English by Johnny Mercer). I'd commented earlier that you could tell the original language, but it wasn't true this time. I think this may be because the melody is so forgiving--extra syllables slide in naturally. Both sound fine, neither seems more awkward than the other.