(In Persian) Published by Nashr-e Daneshgahi (University Publications) Written by Kenneth Katzner Translated by Razi Hirmandi (Khodadadi) In 435 pages, goes for Rls.15,000 Today the number of the world's languages is more than 1,000. Most of these language are unknown. This book comprises three chapters. The first chapter describes the language families of the world, the second chapter describes 200 languages and the third chapter presents a comprehensive list of the countries and their prevalent languages.

The book has been prepared for linguists and those who are interested in languages of the world.