4. An audio guidance system including a speech information center having a center-side storing means storing speech information in a plurality of languages and a center-side communication means for performing communication with outside and an electronic apparatus capable of communicating with the center-side communication means, the electronic apparatus comprising: a position detecting means for detecting a position of the electronic apparatus; a specific information storing means storing information specific to the electronic apparatus; an electronic apparatus-side communication means for communicating with the center-side communication means; an electronic apparatus-side storing means for storing speech information used for audio guidance; a speech output means for providing audio guidance using the speech information stored in the electronic apparatus-side storing means; an updating means communicating with the center-side communication means through the electronic apparatus-side communication means to update the speech information in the electronic apparatus-side storing means by acquiring speech information in a language corresponding to the position information, speech information in a language corresponding to destination information of the electronic apparatus determined from the specific information, and speech information in a language corresponding to user information of the electronic apparatus determined from the specific information from the center-side storing means; and an instruction means for allowing the user to instruct priority of the position information, the destination information and the user information, when the updating means uses pieces of information for updating.
5. The audio guidance system according to claim 4 , wherein: the updating means transmits the position information and the specific information to the speech information center by the electronic apparatus-side communication means; and the speech information center includes a center-side determining means for determining a language corresponding to the position information and determining the destination information and the user information of the electronic apparatus from the specific information to determine a language corresponding to the destination information and the user information, the center transmitting speech information in a language determined by the center-side determining means to the electronic apparatus by the center-side communication means.