It is divided into three main groups, each one representing a local form of Sabino.
Aquilano (also known as Cicolano-Reatino-Aquilano): it is the most important dialect of Sabino and it is considered the standard form. The area where it is spoken covers the largest part of Sabino's zone, in the province of Rieti and in the northern province of Aquila.
Carseolano or Sublacense, a form of Sabino spoken in province of Rome (Subiaco) and in Carsoli.
Many authors consider Sabino as an independent group of Italian language distinguished from Central Italian. It is the only dialect which keeps the two affixes-o and -u of Late Latin,[citation needed] so there are words like cavajju 'horse', from Latincaballus, and scrio 'I write', from Latin scribo.
In a large zone between Rieti and Aniene Valley local dialects keeps the Late Latin vocalic system: words in which stressed vowels are e or o the final affix is -o, in words in which stressed vowel are i or u the final affix is -u (riccu 'rich', novu 'new', omo 'man', otto 'eight').
