cubicweb #5100373 messages d'erreur liés à la violation de contraintes d'unicité non traduits [validation pending]

prioritynormal
typebug
done in3.20.5
load left0.000
closed by#2cdab5e33542 [i18n] properly translate error messages related to violated unicity constraint.
patch[i18n] properly translate error messages related to violated unicity constraint. [applied]