31707 Bolivian Sign Language 100-999 23,000 (estimated) "The Ethnologue reports 350 to 400 users of this sign language living in Cochabomba, La Paz, Riberalta, and Santa Cruz.... The number of sign language users reported in the Ethnologue is based on research from 1988 (20 years old). The current number of LSB users is likely to be significantly higher." Bolivia Deaf Community and Sign Language Pre-Survey Report On 100-999