|Southwestern and Southeastern Russia|
The Mordvinic languages, alternatively Mordvin languages, or Mordvinian languages (Russian: ? , Mordovskiye yazyki, the official Russian term for the language pair), are a subgroup of the Uralic languages, comprising the closely related Erzya language and Moksha language (both spoken in Mordovia). Previously considered a single "Mordvin language", it is now treated as a small language grouping. Due to differences in phonology, lexicon, and grammar, Erzya and Moksha are not mutually intelligible, to the extent that the Russian language is often used for intergroup communications.
Phonological differences between the two languages include:
The medieval Meshcherian language may have been Mordvinic or close to Mordvinic.