Prior to its retirement,[1] the ISO name of the ISO code [bpb] was Barbacoas, the name of an extinct people who gave their name to the Barbacoan language family of which Pasto is a member, as well as to the Colombian town of Barbacoas.
However, nothing is known of their language, one of several also known as Colima,[2] and it can only be assumed to be part of the Barbacoan family.
MultiTree conflates Barbacoas with neighboring Pasto, which is attested sufficiently for classification and assignment of an ISO code.
This does not, however, mean that the retired ISO code [bpb] can be properly used for the Pasto language.
This article related to the Indigenous languages of the Americas is a stub.