1. A translation apparatus, comprising: a speech input unit that receives a speech of a first language from a user; a control unit that generates sentences of the first language from the speech of the first language input from the speech input unit; a communication unit that transmits the sentences of the first language to a translation server and receives sentences of a second language from the translation server; a display unit that displays the sentences of the second language along with previously translated sentences; a memory that stores a translation history including the sentences of the first language and the sentences of the second language; and a user input unit that receives an operation input of the previously translated sentences from a user, wherein the sentences of the second language are translated sentences corresponding to the sentences of the first language, wherein the control unit is configured to confirm whether the same words as words included in the sentences of the first language are present within the translation history according to an input of the user and if determined that the same words are present, perform a controls to display the same words.