Arabic is the official language. Berber, Italian and English are understood in all the big cities.

The main language used in both written and spoken expression in Libya is Arabic.

Arabic, Italian and English are all widely understood in Libya's major cities.

Answer

The main language spoken in Libya is Arabic, which is also the official language. Tamazight (i.e. Berber languages), which do not have official status, are spoken by Libyan Berbers. Berber speakers live above all in the Jebel Nafusa region (Tripolitania), the town of Zuwara on the coast, and the city-oases of Ghadames, Ghat and Awjila. In addition, Tuaregs speak Tamahaq, the only known Northern Tamasheq language. Italian and English are sometimes spoken in the big cities, although Italian speakers are mainly among the older generation.

Answer

The official language of Libya is Arabic, but many of the people speak English as a second language. Some older people still speak Italian. Some people (about 4%) also speak various Berber dialects, although Muammar al-Gaddafi, the dictator of Libya from 1969 to 2011, persecuted people who used the Berber languages.

Answer
arabic
Arabic is the official language.
The most spoken language in Libya is of course Arabic.
Libyan Arabic, other Arabic dialects, and Berber
Arabic is the official language.
Depending on what you mean by "main" language, it could be any one of the 9 spoken languages in Libya:

1. Arabic, Libyan Spoken

2. Arabic, Standard

3. Awjilah

4. Domari

5. Ghadamès

6. Libyan Sign Language

7. Nafusi

8. Sawknah

9. Tamahaq, Tahaggart