alanbit, it's my understanding that "The Impossible Dream" was originally written in English, for the English-language play "Man of La Mancha", lyrics by Joe Darion, music by Mitch Leigh. The production was subsequently translated into French, and Jacques Brel sang Le Reve Impossible, a French translation of The Impossible Dream, in his role as Don Quichotte. I don't know whether Brel did the translation. He did not write the song.

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