This is the 427th most frequent Persian word.
فارس
"Fars" refers to a historical region in Iran, also meaning "Persia" or the Persian language.
In this context, 'فارس' is used to refer to the Persian people as an ethnic group.
ایران کشور فارسها است.
Iran is the land of the Persians.
Here, 'فارس' refers to the historical identity of the Persian people.
داستانی از زبان فارسهای باستان نقل شده است.
A story from the ancient Persians' narrative has been told.
In this context, 'فارس' (used in the adjective form 'فارسی') refers to the Persian language.