Agadir is a major city in Morocco, on the shore of the Atlantic Ocean near the foot of the Atlas Mountains, just north of the point where the Souss River flows into the ocean, and 509 kilometres (316 mi) south of Casablanca. Agadir is the capital of the Agadir Ida-U-Tanan Prefecture and of the Souss-Massa economic region.

Shilha, now more commonly known as Tashelhiyt, Tachelhit, is a Berber language spoken in southwestern Morocco. When referring to the language, anthropologists and historians prefer the name Shilha, which is in the Oxford English Dictionary (OED). Linguists writing in English prefer Tashelhit. In French sources the language is called tachelhit, chelha or chleuh.