| name | Ethnologue status | language family | office | IETF | alphabet | ISO 6391 | ISO 6392 | ISO 6393 | speakers (people) | Manuscript | micronation | publisher | former country | is a dialect |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Russian language | 1 National | East Slavic languages | Organización de las Naciones Unidas | Russian alphabet | ru | rus | rus | 1 | Yes | |||||
| Belarusian language | 1 National | Balto-Slavic languages | Belarusian alphabet | be | bel | bel | 4,000,000 | Yes | ||||||
| Lithuanian language | 1 National | Indo-European languages | Latin script | lt | lit | Either:$#$lit –Modern Lithuanian$#$olt –Old Lithuanian | 4,000,000 | Yes | ||||||
| Samogitian dialect | 5 Developing | Indo-European languages | Latin script | bat | sgs | 500,000 | Yes | |||||||
| Baltic Romani | 5 Developing | Indo-European languages | Latin script | 30,000 | Yes |