1. A translation device comprising: a region extracting unit that analyses image data that includes characters, and that separates and extracts a character region, and another region whose structural elements differ from those of the character region; a character recognition unit that recognizes characters in the region that is determined to be the character region by the region extracting unit; an associating unit that extracts, from a result of character recognition performed by the character recognition unit, a character string related to the other region, and that associates the character string with the character region from which the character string is extracted and the other region; a translating unit that translates the resulting recognized characters; and a pasting unit that, based on the association between the character string and the other character region, pastes the resulting translation that includes the character string onto the same page as the other region that is associated with the character string.