Draa River
The division of Moroccan Berber languages into three groups, as used by Ethnologue, is common in linguistic publications, but is significantly complicated by the presence of local differences: Shilha is subdivided into Shilha of the Draa River valley, Tasusit (the language of the Souss) and several other mountain languages. Moreover, linguistic boundaries are blurred, such that certain languages cannot accurately be described as either Central Morocco Tamazight (spoken in the central and eastern Atlas area) or Shilha.