Tuba, kuma Bidayat (Bideyat), yare ne na yaren Zaghawa da ake samu a Chadi da yammacin Sudan . Ya bambanta da danginsu na Zaghawa, masu magana da Bidayat sun fi ƙauracewa. Wannan bambance-bambancen ya sa masana tarihi na farko don komawa zuwa gare su a matsayin ƙungiyoyi daban-daban har sai kamanceceniyar harshe ya tabbatar da kusancin harsunan. Tsohon shugaban ƙasar Chadi, Idriss Déby ya kasance daga wannan ƙungiyar. Hammarström, Harald; Forkel, Robert; Haspelmath, Martin, eds. (2017). "Harshen Bidayat". Glottolog 3.0. Jena, Germany: Max Planck Institute for the Science of Human History. Issam Abdalla Ali, Zaghawa Language and History Archived 2006-11-18 at the Wayback Machine, Sudan Vision, 20 September YEAR UNKNOWN