Complex sentence: At the same time, not all literature written in Persian is written by ethnic Persians or Iranians, as Turkic, Caucasian, and Indic poets and writers have also used the Persian language in the environment of Persianate cultures.
Split into simpler sentences: At the same time, not all literature written in Persian is written by ethnic Persians or Iranians. Particularly, Turkic, Caucasian, and Indic poets and writers have also used the Persian language in the environment of Persianate cultures.