The similarities noted between many of the languages of Mesoamerica have led linguistic scholars to propose the constitution of a sprachbund, from as early as 1959 [REF].
They also argued that some of the discarded traits might also be taken into consideration as strengthening the proposal, but they were not sufficient by themselves to act as foundation and other well-documented traits of a more ethnolinguistic character might not be considerable as traits that are linguistic but cultural.