3,890,000 in Morocco (2004 census). Total users in all countries: 3,896,000.
Souss-Massa-Drâa, Guelmim-Es Semara, Marrakesh-Tensift-Al Haouz, and Tadla-Azilal regions: coast south to Ifni, north to near Agadir, northeast to Marrakech outskirts, east to Drâa, including Sous valley, and south near the border.
Prepositions; gender (masculine/feminine); case-marking (marked, unmarked); verb affixes mark person, number, gender of subject; tense and aspect; 32 consonant and 3 vowel phonemes.
Many also use Moroccan Spoken Arabic [ary], especially men but few women.
‘Shilha’ is the Arabic name for Moroccan Berber varieties in general. Muslim.