bonobo

Tupac, a young male bonobo scratching his head. Credit: Lucas Bierhoff, Bonobo Research Project at Kokulofori.

Bonobo speaks in sentences: New study challenges the uniqueness of human language

Joint research from the University of Zurich and Harvard reveals that bonobos use meaningful vocal combinations, suggesting deep evolutionary roots for language
Kenzi the bonobo makes stone tools. Photo: Elizabeth Rubert-Pugh - Great Ape Trust of Iowa/Bonobo Hope Sanctuary

Bonobos were able to communicate complex messages and use tools

Bonobo monkey - full-grown cub. From Wikipedia

Peter Pan syndrome in great apes