English is the most widely spoken foreign language and is the medium of instruction in secondary schools. Amharic was the language of primary school instruction, but has been replaced in many areas by regional languages such as Oromiffa, Somali or Tigrinya. While all languages enjoy equal state recognition in the 1995 Constitution of Ethiopia, Amharic is recognized as the official working language of the Federal Government. The various regions of Ethiopia are free to determine their own working languages, with Oromiffa, Somali and Tigrinya recognized as official working languages in their respective regions.