Zenaga (autonym Tuḍḍungiyya) is a Berber language spoken by some 200 people 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 is 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 /x/ > /k/, as well as a difficult-to-explain profusion of glottal stops. The name 'Zenaga' comes from that of a much larger ancient Berber tribe (Iznagen), known in Arabic as the Senhaja.

Zenaga was once spoken throughout much of Mauritania, but fell into decline when its speakers were defeated by the Maqil Arabs in the Char Bouba war of the seventeenth century. After this war, they were forbidden to bear arms, and variously became either specialists in Islamic religious scholarship or servants to more powerful tribes. It was among the former, more prestigious group that Zenaga survived longest.