Curonian language
The Curonian language (German: Kurisch; Latvian: Kuršu valoda; Lithuanian: Kuršių kalba), or Old Curonian, was a Baltic language spoken by the Curonians, a Baltic tribe who inhabited Courland (now western Latvia and northwestern Lithuania). == Classification == Curonian was an Indo-European language of the Baltic branch, as proven by Jānis Endzelīns.