1. A system comprising: a display device; and at least one processor configured to acquire captured voice data corresponding to a spoken command via a sound collecting device in communication with the at least one processor, analyze the captured voice data and determine phoneme information of the captured voice data, wherein the captured voice data and the phoneme information is compared to at least one of an acoustic model, a language model, and dictionary data, cause the display device to display a phoneme string in real time in a first language that corresponds to analysis results of the sequentially analyzed captured voice data and the determined phoneme information; compare the displayed phoneme string corresponding to analysis results of the sequentially analyzed captured voice data with phoneme information of a word stored in the at least one of the acoustic model, the language model, and the dictionary data, convert an erroneously displayed portion of the phoneme string into a correct phoneme string, and display the corrected phoneme string in a second language, and perform a predetermined operation of the correct phoneme string corresponding to the spoken command based on the analysis of all portions of the captured voice data being complete.