Pannonian Rusyn (руски язик or руска бешеда) or simply Rusyn (or Ruthenian) is a Slavic language or dialect spoken by Pannonian Rusyns in north-western Serbia (Bačka region) and eastern Croatia (therefore also called Yugoslavo-Ruthenian, Vojvodina-Ruthenian or Bačka-Ruthenian). It is similar to East Slavic languages, but has West Slavic phonetics and vocabulary. It has been influenced by surrounding South Slavic languages (Serbian and Croatian).