Russian languages

So what's the official language in Russia? Russian, of course. But there are regions in which other languages are officially recognized. These are:

• in the Altai Republic: Altay

• in the Buryat Republic: Buryat

• in the Chechen Republic: Chechen

• in the Chuvash Republic: Chuvash

• in the Kabardino-Balkar Republic: Kabardian and Karachay-Balka

• in the Karachay-Cherkess Republic: Abaza, Kabardian, Karachay-Balkar and Nogai

• in the Komi Republic: Komi-Zyrian

• in the Mari El Republic: Mari

• in the Sakha Republic: Yakut

• in the Tuva Republic: Tuvin

• in the Udmurt Republic: Udmurt

• in the Republic of Adygea: Adyghe

• in the Republic of Bashkortosta: Bashkir

• in the Republic of Ingushetia: Ingush

• in the Republic of Kalmykia: Kalmyk

• in the Republic of Khakassia: Khakas

• in the Republic of Mordovia: Erzya and Moksha

• in the Republic of North Ossetia-Alania: Ossetic

• in the Republic of Tatarstan: Tatar

• in Agin-Buryat Autonomous Okrug: Buryat

• in Chukotka Autonomous Okrug: Chukchi

• in Evenk Autonomous Okrug: Evenk

• in Khanty-Mansi Autonomous Okrug: Khanty and Mansi

• in Koryak Autonomous Okrug: Koryak

• in Nenets Autonomous Okrug: Nenets

• in Taymyr Autonomous Okrug: Dolgan

• in Ust-Orda Buryat Autonomous Okrug: Buryat

• in Jewish Autonomous Oblast: Yiddish

Of course, there are more languages spoken in the Russian Federation. you can see here and here (or here). Bibliography about some of these languages (only 54 languages with speakers not exceeding 50,000) can be found here. Some of these languages are endangered. See the list.