The following list details the languages spoken in Iran and lists the total number of speakers for each language ( data from Ethnologue ) .
The following are the languages with the greatest number of speakers ( Data from the CIA World Factbook ) : The following list details the languages spoken in Iran and lists the total number of speakers for each language : ( Data from Ethnologue ) although the site is controversial due its wide variation from its 1996 edition as well as the fact that it does not provide sources for their statistics .