| 摘要 |
In the present invention, in a state where displayed is an authentication screen (3c) on which any of a plurality of display languages is the display language (for example, Korean), each time a predetermined number (for example, two) of characters is input to an ID input field (7), IDs that each contain, in order from the beginning, the characters input in order in the ID input field (7) are retrieved from user data (D). As a result of the retrieval, the obtained IDs are made candidate IDs, and in a case where the display languages selected by the users of the candidate IDs are all the same language (for example, if all are Japanese), the display language selected by the users of the candidate IDs is made a first display language. If the display language of an authentication screen (3c) being displayed does not match the first display language, an authentication screen (3d) in the first display language is displayed instead of the authentication screen (3c) being displayed. |
