Le fond de la pirogue ne dit pas ce qu’il y a au fond de l’eau (Proverbe Douala – Cameroun). – Ne racontez pas les secrets de vos amis.
The bottom of the boat does not say what is at the bottom of the water (Duala Proverb – Cameroon). – Don’t tell your friends’ secrets.
African Heritage 
Such a creative way to talk against gossip with a proverb like that.
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