Many Nafana are bilingual in Twi, the regional lingua franca, to some extent. According to SIL, 50% of the people are able to "satisfy routine social demands and limited requirements in other domains", while 20% are able to speak Twi "with sufficient structural accuracy and vocabulary to participate effectively in most formal and informal conversations on practical, social, and occupational topics". The remaining 30% are either able to maintain only very simple face-to-face conversations on familiar topics (15%) or unable to speak Twi at all (15%). 15–25% of the Nafana people are literate in Twi, whereas only 1–5% are literate in Nafaanra.