Speech given by a speaker in English is recognized. An upper half of a subtitle display area of a display used by a listener is used as a parallel area and a lower half thereof is used as an original area. In the parallel area, a parallel subtitle in which an original corresponding to a recognition result of the speech and a translation obtained by translating the original into Japanese are displayed in parallel is displayed. In this manner, the original and the translation are both displayed, and in addition, with respect to each word or phrase of the original, an expression obtained by translating the word or phrase is displayed as the translation, and hence, the listener can easily understand the translation and mistranslation can be easily found. Furthermore, in the original area, an original subtitle including an original not translated yet is displayed.