Jirajaran
Jirajaran was a language isolate once spoken in Venezuela.
An isolate: no relationship to any other known language has been demonstrated.
The Jirajaran languages are a group of extinct languages once spoken in western Venezuela in the regions of Falcón and Lara. All of the Jirajaran languages appear to have become extinct in the early 20th century. According to Glottolog, its languages constitute a language isolate.
From Wikipedia · Jirajaran languages · CC BY-SA 4.0