An interpretation system that includes an optical or audio acquisition device for acquiring a sentence written or spoke in a source language and an audio restoration device for generating, from an input signal acquired by the acquisition device, a source sentence that is a transcription of the sentence in the source language. The interpretation system further includes a translation device for generating, from the source sentence, a target sentence that is a translation of the source sentence in a target language, and a speech synthesis device for generating, from the target sentence, an output audio signal reproduced by the audio restoration device. The interpretation system includes a smoothing device for calling the recognition, translation and speech synthesis devices in order to produce in real time an interpretation in the target language of the sentence in the source language.