Gileki language
Gilaks (Gilaki: گيلٚکؤن, Persian: گیلکها, romanised: Gilek'ha) are an Iranian ethnic group native to the south of Caspian sea. They form one of the main ethnic groups residing in the northern parts of Iran. Gilaki is an Iranian language of the Northwestern branch, spoken in south of Caspian Sea by Gilak people. Gilaki is closely related to Mazandarani. The two languages of Gilaki and Mazandarani have similar vocabularies.