Tamacheq is a group of closely related dialects spoken by the Tuareg people. With more than 3 million speakers, the various dialects are the common language that unites the Tuareg people.
The Tuareg dialects are uniquely different from Tamazight dialects such as Taqbaylit, Irifiyen, Siwi, Nafusi & etc due to the retainment of "archaic" Tamazight letters and the ancient Tifinagh writing script. The Tuareg dialects have two short vowels, unlike most other dialects which have one or none at all. Tamacheq dialects also have a very low number of loanwords from Arabic & French.
While the dialects share many similarities, there are notable differences depending on the region. Much so that some linguists even classify certain dialects as entirely separate languages.
The various dialects are:
Tamahaq (Spoken primarily by the Kel Ajjer Tuaregs of Algeria & Libya)
Tamasheq (Spoken primarily by the Kel Adrar Tuaregs of Azawad)
Tawellemet (Spoken primarily by the Iwellemmeden in Mali, Azawad & Niger)
Tahaggart (Spoken primarily by the Kel Ahaggar Tuaregs of Southern Algeria)
Tayirt (Spoken primarily by the Kel Aïr Tuaregs of Niger)
Tetserret (Spoken primarily by the Kel Eghlal Tuaregs of Niger)
Today, the Tuareg dialects are primarily written in the indigenous Tifinagh writing script or a newly adopted standardized Latin form commonly used in Mali & Niger!