South Estonian today. Seto is marked with light red colour.
Percentage of Seto speakers in Estonian municipalities according to the Estonian census 2011.
Seto or Setu language (seto kiil´;Estonian: setu keel) is a dialect of the South Estonian or Võro language (although the Setos generally don't identify as Võro speakers), spoken by 12,549 people. The speakers, Seto people, mostly inhabit the area near Estonia's southeastern border with Russia, in the county of Setomaa.