''what do you know about the development of Arabic Morphology?" Arabic language is the main language that used by all of Arabic provinces and almost reach 20 million of Arabic language's speaker around the world. Previously, this language is pure and secure from any mistaken or addition when the time of Al-Quran was revealed. It is starting to assimilate when the entering of the Persian people in Arab people and Islam and many of them had an important position for instance in politic, military, teacher and religion expert. It was happened during the time of Abbasid caliph There is another race who are also caused the assimilation to an Arabic language like Indian,Grecian and etc. Consequently, it is appears the slang in Arabic language and became an apprehension between Arabian.This case got the intention from some of Arabic people especially scholars. They started to think the way on how to recover the Arabic language