1. A method of managing a language for text input in a mobile terminal, the method comprising: receiving a first message from a sender; displaying a messaging application including the received first message on a display of the mobile terminal; receiving an input for displaying a menu for managing the language for the text input via an input unit of the mobile terminal comprising a touch screen while the received first message is displayed on the display; displaying the menu for managing the language for the text input on the display in response to the input; selecting and displaying the language related to the sender for the text input from the menu with or without input by a user; storing contact information comprising a name of the sender and the selected language in a memory, wherein the selected language is applicable to the text input for the sender, wherein the selecting and displaying the language related to the sender comprises at least: determining a second language from content of the received first message, wherein the language related to the sender is automatically selected and displayed in the menu based on the determined second language without input by the user; or determining a third language based on a messaging address of the sender in the received first message, wherein the language related to the sender is automatically selected and displayed in the menu based on the determined third language without input by the user; displaying, on the display, a first address inputting window of the messaging application for receiving recipient information; displaying a name or a messaging address of a first recipient in the first address inputting window in response to an input received via the input unit for entering first recipient information for a second message to be transmitted from the mobile terminal to the first recipient; and displaying, on the touch screen, a keyboard including a plurality of characters from a character set corresponding to a language related to the first recipient based on the displayed name or messaging address of the first recipient, wherein the language related to the first recipient is derived from: the messaging address of the first recipient displayed in the first address inputting window when the first recipient has not been stored as a contact item in a phonebook of the mobile terminal, the messaging address of the first recipient comprising a phone number or an e-mail address; and a language set for the first recipient when the first recipient information is stored in the phonebook and the first recipient information includes the language set for the first recipient.