1. A translation device, comprising: a dictionary that stores a set of words and their corresponding meanings in a plurality of languages; an input unit that inputs a document; a translated term selection unit that selects from the dictionary a translated term for each of words in the input document; a translated term output unit that outputs an output image on a paper document, containing the translated terms; a section determining unit that, after the output image on the paper document is outputted from the translated term output unit and the paper document is inputted into the input unit, determines a section of a text to be translated in the output image on the paper document; a translating unit that translates the text of the determined section; a translation output unit that outputs the translated text; an ID assigning unit that assigns a unique ID to the document; a memory that stores the unique ID, the words, and the translated terms for the words; an ID recognizing unit that recognizes the unique ID from the output image on the paper document; and a reading unit that reads from the memory, the words and the translated terms for the words corresponding to the recognized unique ID.