The languages of Ethiopia include the official languages of Ethiopia, its national and regional languages, and a large number of minority languages, as well as foreign languages. Overview There are 92 individual languages indigenous to Ethiopia according to Ethnologue, with the 1994 Ethiopian census indicating that some 77 tongues were spoken locally. Most of these languages belong to the Afroasiatic family (Semitic and Cushitic languages; Omotic languages are also spoken, but their classification as Afroasiatic remains disputed). Additionally, Nilo-Saharan languages are spoken by what the government calls the "Nilotic" people, though scholars distinguish Nilotic from the Surmic languages, Gumuz languages, and Koman languages spoken in Ethiopia. Of the languages spoken in Ethiopia, 91 are living and 1 is extinct. 41 of the living languages are institutional, 14 are developing, 18 are vigorous, 8 are in danger of extinction, and 5 are near extinction. Charles A. Ferguson proposed the Ethiopian language area, characterized by shared grammatical and phonological features in 1976. This sprachbund includes the Afroasiatic languages of Ethiopia, not the Nilo-Saharan languages. In 2000, Mauro Tosco questioned the validity of Ferguson's original proposal. There is still no agreement among scholars on this point, but Tosco has at least weakened Ferguson's original claim. English is the most widely spoken foreign language and is the medium of instruction in secondary schools and universities. Amharic was the language of primary school instruction but has been replaced in many areas by local languages such as Oromo and Tigrinya. After the fall of the Derg in 1991, the 1995 Constitution of Ethiopia granted all ethnic groups the right to develop their languages and to establish first language primary education systems. This is a marked change to the language policies of previous governments in Ethiopia. In terms of writing systems, Ethiopia's principal orthography is the Ge'ez script. Employed as an abugida for several of the country's languages. For instance, it was the primary writing system for Afan Oromo until 1991. The Ethiopic script first came into usage in the sixth and fifth centuries BC as an abjad to transcribe the Semitic Ge'ez language. Ge'ez now serves as the liturgical language of the Ethiopian and Eritrean Orthodox and Catholic Churches. Other writing systems have also been used over the years by different Ethiopian communities. These include Arabic script for writing some Ethiopian languages spoken by Muslim populations and Sheikh Bakri Sapalo's script for Oromo. Today, many Cushitic,