Ah ah yes! Good old times! Since you're french you must have known "Knots Landing" as "Côte Ouest" ("West Coast") or "Charlie's Angels" as "Drôles de dames" ("Funny Ladies") and so on... And let's not forget the ridiculous songs they used to add to the opening titles ( Dallas, Knots Landing ...)
Yes, I loved "Knots-Côte-Landing-Ouest" very much actually. I couldn't miss an episode. At first I watched it just like that. By season 4 I was fan. And to be honest, I liked the song (but well, I was a young teen a the time lol)
Yes; "Drôles de Dames" was a silly title for Charlie's Angels. But french channels had silly translations for they show. Like "Hart to Hart" becoming "L'Amour du risque" (with the cheap song too)... There was also "The Bionic Woman" becoming "Super Jaimie", the "A team" becoming "L'Agence tout risque" (all risk agency)
Yeah, especially the french opening song for DALLAS was sooo funny and a little cringy as well.. ("DAAAAAAA - LLAAAAAAS")

I wonder if they used that for the 2012 TNT-Version as well?

But i actually really liked the french "Côte Ouest" opening song, even though the original theme is way better.
But as far as i know they didn't change the themes of Dynasty, The Colbys and Falcon Crest, i've had some of those in french on VHS and they had the original theme. Maybe those shows were on another french network than Dallas and Côte Ouest?
Yes,
Dallas/Knots were broadcast on TF1, and
Dynasty on FR3 (Now France 3)
@xab Good (well, not so good) find : I didn't know either they changed the TNT
Dallas opening music too. Oops, they did it again...
Still crappy. Worst to be honest. At least OG
Dallas had the excuse to be aired in the 80's.
OMG, "Dallas, ville mirage", the french opening...

What a crappy, crappy song. It's so horrible... "Dallas, ton univers impitoyable" sounds like Mozart in comparison.