what do you know about Arabic?

[b]Arabic [/b] (الْعَرَبيّة al-arabiyyah or just عَرَبيْ arabī) is the largest living member of the Semitic language family in terms of speakers. Classified as Central Semitic, it is closely related to Hebrew and Aramaic, and has its roots in a Proto-Semitic common ancestor. Modern Arabic is classified as a macrolanguage with 27 sub-languages in ISO 639-3. These varieties are spoken throughout the Arab world, and Standard Arabic is widely studied and known throughout the Islamic world.
Modern Standard Arabic derives from Classical Arabic, the only surviving member of the Old North Arabian dialect group, attested epigraphically since the 6th century, which has been a literary language and the liturgical language of Islam since the 7th century.
Arabic has lent many words to other languages of the Islamic world, as Latin has contributed to most European languages. And in turn, it has also borrowed from those languages, as well as Persian and Sanskrit from early contacts with their affiliated regions. During the Middle Ages, Arabic was a major vehicle of culture, especially in science, mathematics and philosophy, with the result that many European languages have also borrowed numerous words from it, especially Spanish and Portuguese due to both the proximity of European and Arab civilization and 700 years of caliphate government in the Iberian peninsula.
Spoken in:   Algeria, Bahrain, Egypt, Iraq, Jordan, Kuwait, Lebanon, Libya, Mauritania, Morocco, Oman, Palestine , Qatar, Saudi Arabia, Sudan, Syria, Tunisia, United Arab Emirates, Western Sahara, Yemen and a lot of Muslims that are not native Arabic around the world.

Dialects and descendants
"Colloquial Arabic" is a collective term for the spoken varieties of Arabic used throughout the Arab world, which, as mentioned, differ radically from the literary language. The main dialectal division is between the North African dialects and those of the Middle East, followed by that between sedentary dialects and the much more conservative Bedouin dialects. Speakers of some of these dialects are unable to converse with speakers of another dialect of Arabic; in particular, while Middle Easterners can generally understand one another, they often have trouble understanding North Africans (although the converse is not true, due to the popularity of Middle Eastern—especially Egyptian—films and other media).
One factor in the differentiation of the dialects is influence from the languages previously spoken in the areas, which have typically provided a significant number of new words, and have sometimes also influenced pronunciation or word order; however, a much more significant factor for most dialects is, as among Romance languages, retention (or change of meaning) of different classical forms. Thus Iraqi aku, Levantine fīh, and North African kayən all mean "there is", and all come from classical Arabic forms (yakūn, fīhi, kā'in respectively), but now sound very different.
The major groups are:
•   Egyptian Arabic مصري : Spoken by about 79 million people in Egypt and perhaps the most widely understood variety, due to the popularity of Egyptian-made films and TV shows
•   Maghrebi Arabic مغربي (Algerian Arabic, Moroccan Arabic, Tunisian Arabic, Maltese and western Libyan Arabic) The Moroccan and Algerian dialects are each spoken by about 20 million people.
•   Levantine Arabic شامي (Western Syrian, Lebanese, Palestinian, western Jordanian and Cypriot Maronite Arabic)
•   Iraqi Arabic عراقي (and Khuzestani Arabic) - with significant differences between the more Arabian-like gilit-dialects of the south and the more conservative qeltu-dialects of the northern cities

•   Gulf Arabic خليجي (Bahrain, Saudi Eastern Province, Kuwait, UAE, Qatar, and Oman)

•   Ḥassānīya حساني (in Mauritania, Mali and western Sahara)
•   Sudanese Arabic سوداني (with a dialect continuum into Chad)
•   Hijazi Arabic حجازي (western Saudi Arabia)
•   Najdi Arabic نجدي (Najd region of central Saudi Arabia)
•   Yemeni Arabic يمني (Yemen to southern Saudi Arabia)
•   Andalusi Arabic أندلسي (Iberia until 17th century)
•   Siculo Arabic صقلي (Sicily, South Italy until 14th century)
•   Maltese مالطي, which is spoken on the Mediterranean island of Malta, is the only one to have established itself as a fully separate language, with independent literary norms. Apart from its phonology, Maltese bears considerable similarity to urban varieties of Tunisian Arabic, however in the course of history, the language has adopted numerous loanwords, phonetic and phonological features, and even some grammatical patterns, from Italian, Sicilian, and English. It is also the only Semitic tongue written in the Latin alphabet.
from the website wikipedia.org