The official language of Libya is Modern Standard Arabic. Most residents speak one of the varieties of Arabic as a first language, most prominently Libyan Arabic, but also Egyptian Arabic and Tunisian Arabic.

Various Berber languages are also spoken, including Tamasheq, Ghadamès, Nafusi, Suknah and Awjilah. Both Berber and Arabic languages belong to the wider Afroasiatic (Hamito-Semitic) family.

Berber speakers number around 1 million individuals. Of these, the most significant group, the Nafusi, Tripoli and Zuwara, is concentrated in the Tripolitanian region. Berber languages are also spoken in some oases, including Ghadamès, Awjilah, Sawknah. Tamahaq is spoken by the Tuareg.

More Info: en.wikipedia.org