lang_araArabic (العربية or عربي/عربى) is a name applied to the descendants of the Classical Arabic language of the 6th century CE. This includes both the literary language and the spoken Arabic varieties.
The literary language is called Modern Standard Arabic or Literary Arabic. It is currently the only official form of Arabic, used in most written documents as well as in formal spoken occasions, such as lectures and news broadcasts.
The spoken Arabic varieties are spoken in a wide arc of territory stretching across the Middle East and North Africa.
Arabic languages are Central Semitic languages, most closely related to Hebrew, Aramaic, Ugaritic and Phoenician. The standardized written Arabic is distinct from and more conservative than all of the spoken varieties, and the two exist in a state known as diglossia, used side-by-side for different societal functions.
If Arabic is considered a single language, it may be spoken by as many as 280 million first language speakers, making it one of the half dozen most populous languages in the world. If considered separate languages, the most-spoken variety would most likely be Egyptian Arabic, with 95 million native speakers — still greater than any other Semitic language.
The modern written language (Modern Standard Arabic) is derived from the language of the Quran (known as Classical Arabic or Quranic Arabic). It is widely taught in schools, universities, and used to varying degrees in workplaces, government and the media. The two formal varieties are grouped together as Literary Arabic, which is the official language of 26 states and the liturgical language of Islam. Modern Standard Arabic largely follows the grammatical standards of Quranic Arabic and uses much of the same vocabulary.
The sociolinguistic situation of Arabic in modern times provides a prime example of the linguistic phenomenon of diglossia, which is the normal use of two separate varieties of the same language, usually in different social situations. In the case of Arabic, educated Arabs of any nationality can be assumed to speak both their local dialect and their school-taught Standard Arabic. When educated Arabs of different dialects engage in conversation (for example, a Moroccan speaking with a Lebanese), many speakers code-switch back and forth between the dialectal and standard varieties of the language, sometimes even within the same sentence.
The issue of whether Arabic is one language or many languages is politically charged, similar to the issue with Chinese, Hindi and Urdu, Serbian and Croatian, Scots and English etc. The issue of diglossia between spoken and written language is a significant complicating factor: A single written form, significantly different from any of the spoken varieties learned natively, unites a number of sometimes divergent spoken forms. For political reasons, Arabs mostly assert that they all speak a single language, despite significant issues of mutual incomprehensibility among differing spoken versions.