Human rights, democracy and the rule of law appear in the international human rights system at the same time as cause and consequence of its expansion. Within these inflows, the Inter-American System emerges with the intention of corroborating and consolidating the democratic transition of the states of the region. These pretensions support the structure of a Latin-American ius commune which, in turn, encourage substantive parameters that, without overpowering the intrinsic plurality, preserve the core of the triad above. This is only possible through the multiple dialogues between national and international legal systems in order to draw this cosmopolitan democratic horizon. The purpose of this paper is to investigate how the Inter-American Court, through its militant jurisprudence, dialogue with constitutional internal systems in an attempt to set standards to achieve a common and shared notion of democratic exercise.