"Text-to-speech" (TTS) is a system or program that converts text into synthesised speech. Applications of TTS include making text content accessible by illiterate or vision-impaired people.
In Africa, the Local Language Speech Technology Initiative (LLSTI) has taken the lead in developing TTS programs for African languages in collaboration with local and international partners.
Wikipedia, "Logiciels TTS (Text To Speech)," http://fr.wikipedia.org/wiki/Screen_reader#Logiciels_TTS_.28Text_To_Speech.29
______, "Speech synthesis," http://en.wikipedia.org/wiki/Speech_synthesis
______, "Synthèse vocale," http://fr.wikipedia.org/wiki/Synth%C3%A8se_vocale