12. The screen controlling apparatus according to claim 8 , wherein number of the first buttons is equal to or larger than three.
8. A screen controlling apparatus comprising a display section that displays a plurality of first buttons for switching languages and at least one second button, which is displayed in a language currently selected, on a screen; and a display controlling section that controls a display of the first buttons on the screen, wherein the display section displays, at each of positions corresponding to each of the first buttons on the screen, characters in both (a) a language which is to be switched to by each of the first buttons and (b) the language currently selected; the languages which are to be switched to by the respective first buttons are different from each other; and when one of the first buttons is selected, the display section displays on the screen, at a position corresponding to the at least one second button, the at least one second button in both (a) a language switched to by the selected one of the first buttons and (b) the language currently selected.