The dictionary Kholasat al-loghat, compiled by Ebn-e Abu al-Mohsen Mohammad Jonabadi (died in the 16th century) consists of two chapters. The first chapter includes Arabic words together with their Persian translation, and the second chapter comprises Persian words followed by their Arabic meanings.The present article makes a thorough study of this dictionary in respect of the languages and dialects used in it. The prominent languages appearing in this word list are: Arabic (with Shami, Yamani, Kufi, Baghdadi and Mesri [Egyptian] dialects); Indian; Turkish; Rumi [Latin!]; and the Iranian languages including Pahlavi, Khwarazmi, and the Ancient Persian. Besides, this article addresses the dialects of different cities and regions of Iran named in the dictionary: places such as Azerbaijan, Isfahan, Khorasan, Kerman, Shiraz, Hamadan, Marv and Transoxiana. In the end, reference is made to the degree of influence received by the Kholasat al-loghat from other word lists, especially from the Taj al-masader.