A management computer (21) is placed in a home country, and an instructor terminal (31) and a driver terminal (32) are placed in a delivery area overseas. The management computer (21) generates screen information, displayed in a domestic language and including a delivery instruction for a package, and transmits the screen information toward the instructor terminal (31) and the driver terminal (32). The instructor terminal (31) or the like, specifies a language, to be used in an area to which a delivery destination belongs, from the address of the delivery destination included in the delivery instruction in the received screen information, and translates the screen information in the specified language, then displays it. When a display language is designated, the instructor terminal (31) or the like translates the screen information in the designated language and displays it.