Yurumanguí
Yurumanguí was a language isolate once spoken in Colombia.
An isolate: no relationship to any other known language has been demonstrated.
Yurumanguí is an extinct language isolate formerly spoken in Colombia. It is known solely from a wordlist collected in the 1760s and was proposed in 1942 by French linguist Paul Rivet to be a member of the proposed Hokan language family, though this is no longer accepted by modern classifications.
From Wikipedia · Yurumanguí language · CC BY-SA 4.0