There are two more songs with some popularity that people may not know that they were originally French songs.
Hey, that's exactly what I posted in Post #8, very early in the thread.
"My Way", and "Seasons in the Sun"
I mentioned "My Way", written by Claude Francois, on Post #3. On Post #8, I named "If You Go Away", and "Seasons in the Sun".
Both original songs "Ne Me Quitte Pas" (Do Not Leave Me, 1959), and "Le Moribond" (The Dying, 1961) were written and recorded by Jacques Brel, a beloved Belgian artist. He died young at 49 of a lung illness.
The English lyrics of "If You Go Away" was written by the late Rod McKuen. I did not know about McKuen, but found out that he was called "the unofficial poet-laureate" of America.
Yet, the English lyrics of "If You Go Away" has been called a disappointing translation of the French lyrics, which is a lot bleaker and groveling. But I think McKuen softened it, in order to appeal to the more general taste.
Brel has said that it "was not a love song, but rather "a hymn to the cowardice of men", and the degree to which they were willing to humiliate themselves".
PS. Wikipedia says that "Ne Me Quitte Pas" has been translated to at least 24 languages.