1. A text display apparatus comprising: a display section; a dictionary storage section configured to store dictionary information that includes a plurality of headwords, wherein each headword of the plurality of headwords has corresponding description information in the dictionary information; a text storage section configured to store text data including a plurality of words; a text/translation display control section configured to (i) display the text data stored in the text storage section on the display section, (ii) search in the dictionary information for a headword corresponding to a word in the text data, and (iii) display a portion of the description information of the searched headword as an initial translated word such that the initial translated word is displayed in a position that corresponds to the word corresponding to the searched headword; a selection section configured to select a word, in accordance with a user operation, as a specified word, wherein the specified word is from the text data displayed on the display section or wherein the specified word is the initial translated word; a description information display control section configured to (i) search in the dictionary information for a headword corresponding to the specified word and (ii) display on the display section the description information of the headword corresponding to the specified word; a translated word selection section configured to select, in accordance with a user operation, a portion of the description information displayed by the description information display control section as a selected translated word, wherein the text/translation display control section includes a selected translated word discrimination display section configured to (i) replace the initial translated word with the selected translated word and (ii) display the selected translated word with a display form different from a display form of the initial translated word; a translated word storage section configured to store in correspondence with the translated word (i) the word corresponding to the specified word, and (ii) the initial translated word; and a detecting section configured to detect another occurrence of a word in the text data from the text storage section wherein the another occurrence is displayed by the text/translation display control section, wherein the another occurrence corresponds to the specified word and is stored by the translated word storage section, and the text/translation display control section comprises a mark display section configured to display a mark indicating that the another occurrence is another occurrence of a word for which an initial translated word has already been displayed, and wherein the mark is displayed for the another occurrence instead of displaying the initial translated word for the another occurrence.