Complex sentence: Indeed, this was recognized by the Hafsid scholar Ibn Khaldun in his Muqaddimah in 1377 when saying that language contact between classical Arabic and local languages caused the creation of many Arabic varieties that are very distinct from Formal Arabic Khaldūn, I. (1969).
Split into simpler sentences: Indeed, this difference was recognized by the Hafsid scholar Ibn Khaldun in his Muqaddimah in 1377. He said that language contact between classical Arabic and local languages caused the creation of many Arabic varieties that are very distinct from Formal Arabic Khaldūn, I. (1969).