A terminal device comprising: a sound receiving means configured to receive a sound emitted according to an audio signal to generate a received-audio signal, the audio signal including an audio signal that represents a guide voice and including a modulated signal that includes identification information that is assigned to the guide voice, the identification information uniquely identifying the guide voice from among a plurality of guide voices; an information extracting means configured to extract the identification information from the received-audio signal generated by the sound receiving means; a transmitting means configured to transmit, to an information providing means, an information request that includes the identification information extracted by the information extracting means and includes language information indicative of a language specified in the terminal device; an acquiring means configured to acquire, from the information providing means, one piece from among multiple pieces of related information that each correspond to the identification information included in the information request and are each related to the guide voice, the piece of related information being in the language specified by the language information in the information request, the piece of related information being one from among the multiple pieces of related information that are in different languages and that each correspond to the identification information in the information request, the piece of related information being an audio signal that represents a vocal sound that is a spoken rendition of a character string derived from a translation of a spoken content of the sound for reproduction into that specified language, or a character string derived from a translation of a spoken content of the guide voice into that specified language; and an output means configured to output the piece of related information acquired by the acquiring means in parallel with the reproduction of the guide voice by a sound emitting system of the information providing means. a sound receiving means configured to receive a sound emitted according to an audio signal to generate a received-audio signal, the audio signal including an audio signal that represents a guide voice and including a modulated signal that includes identification information that is assigned to the guide voice, the identification information uniquely identifying the guide voice from among a plurality of guide voices; an information extracting means configured to extract the identification information from the received-audio signal generated by the sound receiving means; a transmitting means configured to transmit, to an information providing means, an information request that includes the identification information extracted by the information extracting means and includes language information indicative of a language specified in the terminal device; an acquiring means configured to acquire, from the information providing means, one piece from among multiple pieces of related information that each correspond to the identification information included in the information request and are each related to the guide voice, the piece of related information being in the language specified by the language information in the information request, the piece of related information being one from among the multiple pieces of related information that are in different languages and that each correspond to the identification information in the information request, the piece of related information being an audio signal that represents a vocal sound that is a spoken rendition of a character string derived from a translation of a spoken content of the sound for reproduction into that specified language, or a character string derived from a translation of a spoken content of the guide voice into that specified language; and the piece of related information being in the language specified by the language information in the information request, the piece of related information being one from among the multiple pieces of related information that are in different languages and that each correspond to the identification information in the information request, the piece of related information being an audio signal that represents a vocal sound that is a spoken rendition of a character string derived from a translation of a spoken content of the sound for reproduction into that specified language, or a character string derived from a translation of a spoken content of the guide voice into that specified language; and an output means configured to output the piece of related information acquired by the acquiring means in parallel with the reproduction of the guide voice by a sound emitting system of the information providing means.