 This system has also spread to some languages just outside the Mesoamerican cultural area.No language with verb-final basic word order is attested in Mesoamerica even though most of the languages bordering on Mesoamerica are verb final (SOV).Also no languages with switch reference are attested in Mesoamerica, but this is supposed by Campbell, Kaufman and Smith-Stark to be a secondary effect of the Mesoamerican languages not being verb final.