13. A multilingual transmission system an claimed in claim 9, wherein: the requested information transmission unit of the client device transmits to the server device a search request containing a key word to be searched and key language information indicating the language of the key word; the requested information reception unit of the server device receives the search request from the client device; the server device further includes: a key word conversion unit that converts the key word, based on the key language information included in the search request, into a pivot language key word expressed in the pivot language; and a pivot language search unit that searches the pivot language data stored in the pivot language memory for pivot language data including the pivot language key word; the target language text generator generates target language text data based on the pivot language data searched out by the pivot language search unit; the text transmission unit transmits the target language text data to the server device as a search result; and the reception output unit of the client device receives and outputs the search result.
14. A multilingual transmission system as claimed in claim 13, wherein: the target language text generator generates the target language text data in the language corresponding to the key language information.