It was a series of meetings and lectures devoted to the discussion of cultural and linguistic diversity in Latin America, intended initially as indirect criticism and counter-event for the Third International Congress of the Spanish Language which was being celebrated at about the same time.
It was presided over by the 1980 Nobel Peace Prize Adolfo Pérez Esquivel.
The very name of the Congreso attempted to emphasize the plurality of traditions of the region, over the de facto dominant status of Spanish brought about by the colonization and the ensuing decimation of the indigenous languages of the Americas.
It is due to this emphasis that the S marking the plural in the article las "the" and the noun lenguas "tongues, languages" is in uppercase.
The organizers of the Third Congress pointed out that such criticism are out of date, since the Association of Spanish Language Academies has revised its policies on the acceptance of linguistic innovation and variants.