Classical Arabic

Modern Standard Arabic (MSA) is its direct descendant used today throughout the Arab world in writing and in formal speaking, for example, prepared speeches, some radio broadcasts, and non-entertainment content; it is also used in modernized versions of the Quran and revised editions of poetries and novels from Umayyad and Abbasid times (7th to 9th centuries). While the lexis and stylistics of Modern Standard Arabic are different from Classical Arabic, the morphology and syntax have remained basically unchanged (though MSA uses a subset of the syntactic structures available in CA).
During the first Islamic century the majority of Arabic poets and Arabic-writing persons spoke a form of Arabic as their mother tongue. Their texts, although mainly preserved in far later manuscripts, contain traces of non-standardized Classical Arabic elements in morphology and syntax. By the 2nd century AH, the language had been standardized by Arab grammarians and knowledge of Classical Arabic became an essential prerequisite for rising into the higher classes throughout the Islamic world, as it was the lingua franca across the Middle East, North Africa, and the Horn of Africa, eventually developing into the modern situation of diglossia.
Various Arabic dialects freely borrowed words from Classical Arabic, a situation is similar to Romance languages, wherein scores of words were borrowed directly from Classical Latin. People may speak Classical Arabic as a second language if they speak colloquial Arabic dialects as their first language, but as a third language if others speak other languages native to a country as their first language and colloquial Arabic dialects as their second language. But Classical Arabic was spoken with different pronunciations influenced by vernaculars. The differentiation of the pronunciation and vocabulary of vernaculars was influenced by native languages spoken in the regions, such as Coptic in Egypt; Berber and Punic in North Africa; Himyaritic, Modern South Arabian, and Old South Arabian in Yemen; and Aramaic in the Levant.