2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/79965Statistical properties of the taxonomic classification of human languages are studied. It is shown that, at the highest levels of the taxonomic hierarchy, the frequency of taxon members as a function of the number of languages belonging to each member decays as a power law. This feature reveals that a self-similar structure underlies the taxonomy of languages, exactly as observed in the taxonomic classification of biological species. Such an analogy is a clue to the evolutionary foundation of language classification based on long-range comparison.final version, to appear in Adv. Complex SystemsAdaptation and Self-Organizing SystemsCondensed Mattertext