Final answer:
The language in Persepolis changed from Old Persian to incorporate Arabic during the Arab conquests, while still preserving Persian, which evolved into modern Farsi. This linguistic transition facilitated trade and intellectual exchange across the Islamic empire. The Persian empire also showed language tolerance in its administrative practices.
Step-by-step explanation:
The change in language in the city of Persepolis reflects significant linguistic shifts that occurred due to historical events like the Arab conquests. Initially, Persepolis, as part of the Achaemenid Persian empire, used Old Persian as its vernacular language. However, with the Islamic conquests, there was a widespread introduction of Arabic as the lingua franca across the vast territories under Muslim rule. Despite this, Persian managed to survive and evolved into what is now known as Modern Farsi, the official language of Iran. Another instance of language change in the region includes Greek-speaking areas being influenced by Arabic, though Greek continued to be used and classical literature in Greek was actively translated into Arabic. Additionally, the Persian empire's tolerance of different cultures allowed for the use of various indigenous languages and administrative structures within its conquered lands, as seen in Egypt and Mesopotamia.