Mordovia

The main languages spoken in Mordovia are:
Russian - the language of interethnic communication and administration throughout the Russian Federation.
Erzya and Moksha - the two Mordvin languages (Uralic/Finno-Volgaic), both co-official in this republic of Russia and spoken by the titular Mordvin population.
Russian, Erzya, and Moksha are all official languages of the Republic of Mordovia, a federal subject of Russia.