also: ペルシアご
Persian; Farsi
Refers to the Persian language (Farsi). Both ペルシア語 and ペルシャ語 are used; ペルシア語 is more formal.
He is studying Persian at university.
I like reading Persian poetry.
Common variant; ペルシャ is widely used in everyday contexts and older texts.
From ペルシア/ペルシャ (Persia) + 語 (language). The spelling ペルシア reflects modern academic transliteration, while ペルシャ is an older, more common form.