1. A method for installing a language in a mobile communication terminal, the method comprising: determining at least two installable languages from a multi language image file comprising language packages of the at least two languages; selecting and installing one of the at least two installable languages; storing the multi language image file; when changing a language, determining at least two changeable languages from the multi language image file; changing the installed language by selecting one of the at least two changeable languages; and storing language packages associated with the changed language, wherein the multi language image file comprises a header field comprising configuration information of the multi language image file, a bootloader field comprising control information for a hardware initialization process required for driving an Operating System (OS), an OS image field comprising drive information of the OS, and a language package file field comprising a language package for at least one language.