Bidayat, also Bideyat, is a dialect

Dialect

The term dialect is used in two distinct ways, even by linguists. One usage refers to a variety of a language that is a characteristic of a particular group of the language's speakers. The term is applied most often to regional speech patterns, but a dialect may also be defined by other factors,...

 of the Zaghawa language

Zaghawa language

The Zaghawa language is a Saharan language spoken by the Zaghawa people of eastern central Chad and northwestern Sudan ....

 found in Chad

Chad

Chad , officially known as the Republic of Chad, is a landlocked country in Central Africa. It is bordered by Libya to the north, Sudan to the east, the Central African Republic to the south, Cameroon and Nigeria to the southwest, and Niger to the west...

 and western Sudan

Sudan

Sudan , officially the Republic of the Sudan , is a country in North Africa, sometimes considered part of the Middle East politically. It is bordered by Egypt to the north, the Red Sea to the northeast, Eritrea and Ethiopia to the east, South Sudan to the south, the Central African Republic to the...

. It is also known as Tuba. In contrast to their Zaghawa kin, Bidayat speakers are more nomadic. This difference led early ethnographers to refer to them as different groups until linguistic similarities proved their close relationship.

The current President of Chad, Idriss Déby Itno belongs to this group.