to speak badly of
Dire du mal des autres ne mène nulle part.
Speaking ill of others leads nowhere.
Dobby a failli dire du mal de sa famille.
Dobby almost spoke ill of his family.
— Harry Potter et la Chambre des secrets (2002)
Je t'interdis de dire du mal de Nandini.
I forbid you to speak ill of Nandini.
— Mon cœur est déjà pris (1999)
Ne me provoque pas ou je vais encore dire du mal de ta femme !
Don't provoke me, or I'll say something mean about your wife again!
— Yi Yi (2000)
Monsieur Smith est trop poli pour dire du mal d'autrui.
Mr. Smith is too polite to speak ill of others.
Elles l'ont souvent entendu dire du mal des autres.
They have often heard him speak ill of others.
Excusez-moi, je ne veux pas dire du mal des Anglais.
Excuse me, I don’t mean to speak ill of the English.
— Gramps Is in the Resistance (1983)
Je n'aime pas dire du mal des autres.
I don't like speaking badly of others.
Regarde-toi dans le miroir avant de dire du mal des gens.
Look in the mirror before you talk bad about people.
Je ne l'ai jamais entendue dire du mal des autres.
I've never heard her say anything bad about other people.