Arvanitic or Arvanitika is a descendent of Albanian spoken by the Arvanite people in Greece, especially in southern Greece. It is closely related to the Tosk dialect of Albanian and Arbëresh, the dialect of Albanian spoken in Italy and there is considerable mutual intelligibility between these varieties.
There are somewhere between 30,000 and 150,000 speakers of Arvanitic in about 300 villages, and all of the them also speak Greek. Intergenerational transmission of the language decreasing and the language shift towards Greek has accelerating in recent years.
Arvanitic is written with versions of the Greek or Latin alphabet, although it is not written very often.
source
wikipedia.org, omniglot.com & ethnologue.comyounger brothers