The term Semitic Language was invented by a German scholar in 1781: August Ludwig von Schlözer.
Why is Arabic called a South Semitic language? The reason has to do with the BROKEN PLURAL. Some ideas about that.
Al-Khalil ibn ’Ahmad al-Farahidi (الْخَلِيل بن أَحْمَد الْفَراهِيدِي), a grammarian who was born in 718 (100 AH) in present-day Oman. But that was not his only achievement...
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What role did the Bedouins play in creating Arabic grammar? A big one. There are many anecdotes about scholars who went deep into the desert to find Bedouins who could answer their questions about Arabic grammar.