Zenaga (autonym Tuḍḍungiyya) is a Berber language spoken by some 200 to 300 people (Ethnologue estimate, 1998) between Mederdra and the Atlantic coast in southwestern Mauritania. The language shares its basic structure with other Berber languages, but specific details are quite different; in fact, it's probably the most divergent surviving Berber language, with a significantly different sound system made even more distant by sound changes such as /l/ > /dj/ and /kh/ > /k/, as well… (More on Zenaga)