Hiya Therotak ! thanks a lot....
The names exactly are, for the single target cure " Sécher " & for the cure curse " Remède à la malédiction ". In game, you can do /useability Sécher or /useability Remède à la malédiction and those spells are cast successfully.
I tried, with my newbie knowledge, to download the 2 files ( player & group members files ) you posted on the german issue, replacing " Heilkraft " anytimes by " Sécher ", same for " Fluch heilen " by " Remède à la malédiction "....Same issue in game : ability doesn't exist.....
Heeeeelp !