Neal, "Amour fané" is a good expression because "fané" can be used both in the literal sense (for a flower) and in the figurative (love, beauty, etc.) in French; whereas "déteint" (or "déteindu" in CF?) is ok for a dress or any material, but "un amour déteint / déteindu" does not make sense in French. I suppose it must be the same in CF.
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If you decided to put what you have found out about the American roots of some Cajun songs on your site, no doubt that that would be very interesting for many of us.
Thanks! The Dictionary of Louisiana French by Valdman confirms that fané means wilted. Déteindre means faded, as in colors fading. Sometimes these metaphors don't translate from one language's idiomatic expressions to another's! It's a different way of seeing the world, I guess! In English we speak of someone's popularity fading, or a fade away jump shot in basketall, and it doesn't mean losing color!
I will try to put in a section on Leo Soileau. It was interesting to see a picture of him in the Country Music Hall of Fame in Nashville, the picture of him on the bandstand with a grinning mandolin player leaning back, almost falling off the stand, and Papa Cairo on lap steel!