1. A language data storage and reproduction apparatus, comprising: a language data inputting section for inputting a series of language data as an electric signal string; a tag application section for automatically applying to each of the language data inputted from said language data inputting section a tag representative of a distribution position of the language data in the entire series of language data; a data recognition section for producing a plurality of recognition data sets, wherein each recognition data set corresponds to a portion of said electric signal string, and each recognition data set contains a plurality of candidates for recognition of said language data, wherein each of the candidates of one recognition data set corresponds to the same portion of said electric signal string as the other candidates in said one recognition data set, and wherein each of the candidates of said one recognition data set is different from any other candidate in said one recognition data set; a storage section for storing the recognition data sets together with the language data to which the tags are applied with reference to the tags; a retrieval key inputting section for inputting a word or a phrase by means of keys; a key retrieval section for retrieving that one of the recognition data sets having a candidate which is coincident with the word or phrase inputted from said retrieval key inputting section from within said storage section and outputting the tag corresponding to the retrieved recognition data set as a retrieval result; a data extraction section for referring to the tag of the retrieval result of said key retrieval section to extract the language data designated by the tag from said storage section; and a language data reproduction section for reproducing the language data extracted by said data extraction section.