Farsi (n.)youdaoicibaDictYouDict[Farsi 词源字典]
"the modern Persian language," 1878, from the usual Iranian word for it, from Fars, the Arabic form of Pars (no "p" in Arabic), the name of a region in southwestern Iran, where the modern language evolved from Persian (an Indo-European language), to which many Arabic (Semitic) elements have been added.[Farsi etymology, Farsi origin, 英语词源]