Mammaaksa Afaan Oromoo. Afan Oromo Proverbs; This App contains selected Proverbs or sayings (Mammaaksa) of the Oromo Nation, living in Ethiopia. The app has about 250 proverbs. The proverbs (Mammaaksa) collected here reflect diverse themes, such as, Hope, Compassion, Patience, Courage and others. They are selected from various internet sources and from Afan Oromo speakers.