Dahalo language

Dahalo is an endangered Cushitic language spoken by around 500–600 Dahalo people on the coast of Kenya, near the mouth of the Tana River. Dahalo is unusual among the world's languages in using all four airstream mechanisms found in human language: clicks, implosives, ejectives, and pulmonic consonants.

While the language is known primarily as “Dahalo” to linguists, the term itself is an exonym supposedly used by Aweer speakers that itself essentially means “stupid” or “worthless.” The speakers themselves refer to the language as numma guhooni.