Niger–Nigeria relations on the waters of the Niger River and Lake Chad. Both areas face rapid desertification and increasing demands for water. The two nations are members of the Niger Basin Authority (successor to the 1964 Niger River Commission), the Lake Chad Commission, and the "Niger-Nigeria Joint Committee" has special focus on water and water development issues. The two nations are signatories of The Enugu Agreement (3 December 1977) on common regulations for fauna and flora among the member states of the Lake Chad Basin Commission (Cameroon, Niger, Nigeria and Chad). On 15 January 1990 the two nations signed "The Abuja Agreement"
Languages of Chad teachers for the deaf train in Nigeria. ("Ethnologue" lists 54 Chadic languages in Chad altogether, many of them small.) Languages of Chad Chad has two official languages, French and Modern Standard Arabic, and over 120 indigenous languages. A vernacular version of Arabic, Chadian Arabic, is the lingua franca. Of the two official languages, French has the most speakers in Chad (though Chadian Arabic has more speakers in Chad than both French and Standard Arabic) . Chad submitted an application to join the Arab League as a member state on 25 March 2014, which is still pending. Chadian Sign Language is