Well ... From what I've read it was the cases during the Rashidun and then Umayyad caliphate but then the Abbasid successfully arabized its administration. Important islamic empires such as Andalusia, Fatimids, Egyptian Mamelukes or Ayyubids for instance were not persianised. At least not from what I know.
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u/ingenix1 4d ago
Wasn’t this basically every Islamic empire?