The influence of Arabic, the process of spirantization, and the absence of labialization have caused the consonant systems of Berber languages to differ significantly by region. Berber languages found north of, and in the northern half of, the Sahara have greater influence from Arabic, including that of loaned phonemes, than those in more southern regions, like Tuareg. Many Berber languages have lost use of their original numerals due to the influence of Arabic, such as Tarifit which lost all except one.
