An imaging device includes an information processing terminal acting as an operation unit and a main unit implementing an imaging function. The information processing terminal includes: a language acquisition unit configured to obtain a predetermined selectable language of an operating system and a language of a character string added to an application program by a terminology module; a display unit configured to display the predetermined selectable language of the operating system and the language of the character string added to the application program by the terminology module, as a list of selectable language candidates, on a language setting screen provided to a user to select a display language of the operating system; and a language setting unit configured to change the display language of the operating system into the language selected from the list of the selectable language candidates by the user.