Abstract: A system for idiom simultaneous translation applied to telephonic equipment, conventional or mobile phones and service rendered by a telephonic company allowing complete understanding of a conversation between speaker and listener agents, when both speak different idioms, with the main objective is to allow a concurrent translation of the native idiom of the speaker agent to the native idiom of the listener agent, through the introduction of a idiom translation system, composed by a computer readable program supported by a hardware and linked to a voice recognition device, which may be integrated to a generic telephonic equipment, both conventional and mobile, when in a local application, or directly installed in a telephonic central system, as a service to be rendered to its subscribers.