1. A voice-controlled data system comprising: a data storage unit configured to store a plurality of media files; a vocabulary generating unit configured to generate multilingual phonetic data corresponding to each of the media files; a speech recognition unit configured to recognize a speech control command; a processor configured to select a media file from the media files based on a comparison of a part of the speech control command and the generated multilingual phonetic data corresponding to the media files, where the multilingual phonetic data corresponding to any one of the media files comprises a phonetic representation of each data field of multilingual file identification data in a header section of the media file, and where the phonetic representation of each data field is based on a language identifier associated with said each data field of the multilingual file identification data in the header section; and a media playback unit configured to play the selected media file.