| Selonian | |
|---|---|
| Selian | |
| Native to | Selonia | 
| Region | Latvia and Lithuania | 
| Ethnicity | Selonians | 
| Extinct | 16th century | 
|  Indo-European  
 | |
| Language codes | |
| ISO 639-3 |  sxl  | 
|  sxl  | |
| Glottolog | None | 
 
 Selonian was an East Baltic language, which was spoken by the East Baltic tribe of the Selonians, who until the 15th century lived in Selonia, a territory in southeastern Latvia and northeastern Lithuania. The language persisted until the 16th century. [1]
Traces of the Selonian language can still be found in the territories the Selonians inhabited, especially in the accent and phonetics of the so-called Selonian dialect of the Latvian language. There are some traces of the Selonian language in the northeastern sub-dialects of the Aukštaitian dialect of the Lithuanian language, mostly in the lexicon.[ citation needed ]
It is considered that the Selonian language retained the Proto-Baltic sonorant diphthongs *an, *en, *in, unlike the Lithuanian language, but like the Latvian language the Proto-Baltic *kʲ, *ɡʲ changed to c, dz, and the Proto-Baltic *š, *ž changed to s, z. [2]