The term Galindian is sometimes ascribed to two separate Baltic languages, both of which were peripheral dialects: There are three proposed etymologies for the denomination Galindian:[2]: 308–309 Based on the common name used for the two peoples by ancient authors, some scientists propose a common origin of the two peoples and languages.

[2]: 309 [7] In order to prove this hypothesis, they investigate common features between Old Prussian/West Galindian and East Galindian.

[2]: 309–310 West Galindian is the poorly attested extinct Baltic language of the Galindians previously spoken in what is today northeastern Poland and thought to have been a dialect of Old Prussian,[2]: 290  or a Western Baltic language similar to Old Prussian.

[9] There are no extant writings in Galindian.