Ok this link is interisting
http://www.mage.com/TLbody.html
Some quote to try defend persian culture (Mevlana gelaleddin rumi, you should thank me :rofl: ):
661-750 -- The Umayyad Caliphate emerged as the rulers of the Islamic world. Although they maintained the Sasanians' administrative practices, the Umayyads considered Islam as primarily an Arab religion and were wary of Persian culture. They tried to force the Arabic language upon the Persians, leading to the demise of the Middle Persian or Pahlavi alphabet in favor of the new Arabic/Persian alphabet in use to this day. They also tried to eradicate the independent and unique sense of Persian identity in the same way that they "Arabized" and assimilated the Egyptians and the Assyrians, but with minimal success.
696 -- Arabic became the official language of the Islamic world.
but...
750 -- With Persian financing and support, the Abbasids ended Umayyad rule. Their victorious armies were led by a Persian general named Abu Muslim Khorasani. The Islamic capital was relocated from Damascus to Baghdad, a newly built city adjacent to the old Sasanian capital, Ctesiphon. This relocation symbolized the rising power of Persians in the Islamic world.
750-1258 -- The Abbasid Caliphate relied on Persian ministers and bureaucracy for many state functions. Persian customs began to take deep roots under the Abbasids. The offices of the vizier (minister) and the divan (or bureau for state revenue) were copied from the Sasanian model and later caliphs adopted the Persian courts' ceremonial procedures and the trappings of the Sasanian kings. The Persian Barmakid family became architects of the Abbasid political structure and several members of their family became notable grand viziers. The Abbasid reign marked the pinnacle of the power and glory of the Islamic world.
Persia's Cultural Golden Age
820-1220 -- Arab rule over Persia began to diminish as various local Persian monarchs rose to power: the Tahirids (821-873), Saffarids (867-903), Samanids (873-999), Ziyarids (928-1077) and Buyids (945-1055). They were followed by Turkic dynasties with Persian culture: the Ghaznavids (962-1186), Seljuqs (1038-1153) and Khwarazmis (1153-1220). The modern Persian language was born and it soon blossomed into one of the most poetic languages of the world. The Samanids were the first to adopt Persian as the official language of their court. Once again, Persia became a world center for art, literature and science. Key figures in nearly all fields of endeavor in the Islamic world, Persians played a major role in the advancement of Islamic civilization.
so only the ummayads tried to cancel the persian culture, like they did succefully with assirian, egiptian and african; but they badly failed, and the persian culture was not only firmly kept in Persia, but became the universal language of muslim court (even ottoman); so I can see no points to keep arabic culture in persia in the 1066 hastings scenario.
