11. A non-transitory recording medium recording therein a forensic program which acquires digital information recorded on a plurality of computers or a server to analyze the acquired digital information to cause a computer to execute: a function of acquiring digital document information configured by a plurality of document files and user information related to a user who uses the plurality of computers or a server; a function of recording the digital information acquired by a digital information acquiring unit; a function of displaying the recorded digital information and the user information; a function of accepting designation of at least one document file included in the digital document information and accepting designation of a specific language into which the at least one document file, the designation of which is accepted, is translated; a function of translating the at least one document file the designation of which is accepted into the language the designation of which is accepted; a function of extracting a common document file representing the same contents as that of the designated document file from the digital document information recorded in a recording unit; a function of generating translation-related information representing that the extracted common document file is translated by invoking a translated content of the translated document file, and information representing an output priority order of the plurality of document files; a function of searching, by a multi-language full-text searching unit, the full-text of the document files; a function of setting, by an access right control function of a managing unit, one or more rights for each account of a browsing person; a function of setting incidental information representing whether document files of the extracted digital document information are related to a litigant; a function of generating a plurality of partial character strings from character strings of a predetermined language according to a predetermined rule; a function of evaluating a language to which each partial character string from among the plurality of partial character strings may belong; a function of searching for a character string of the at least one document file stored in the recording unit; a function of discovering the character string that is searched as being a match with one of the plurality of generated partial character strings; a function of determining a language to which the discovered character string of the at least one document file belongs; and a function of outputting a litigant document file based on the translation-related information.
11. A non-transitory recording medium recording therein a forensic program which acquires digital information recorded on a plurality of computers or a server to analyze the acquired digital information to cause a computer to execute: a function of acquiring digital document information configured by a plurality of document files and user information related to a user who uses the plurality of computers or a server; a function of recording the digital information acquired by a digital information acquiring unit; a function of displaying the recorded digital information and the user information; a function of accepting designation of at least one document file included in the digital document information and accepting designation of a specific language into which the at least one document file, the designation of which is accepted, is translated; a function of translating the at least one document file the designation of which is accepted into the language the designation of which is accepted; a function of extracting a common document file representing the same contents as that of the designated document file from the digital document information recorded in a recording unit; a function of generating translation-related information representing that the extracted common document file is translated by invoking a translated content of the translated document file, and information representing an output priority order of the plurality of document files; a function of searching, by a multi-language full-text searching unit, the full-text of the document files; a function of setting, by an access right control function of a managing unit, one or more rights for each account of a browsing person; a function of setting incidental information representing whether document files of the extracted digital document information are related to a litigant; a function of generating a plurality of partial character strings from character strings of a predetermined language according to a predetermined rule; a function of evaluating a language to which each partial character string from among the plurality of partial character strings may belong; a function of searching for a character string of the at least one document file stored in the recording unit; a function of discovering the character string that is searched as being a match with one of the plurality of generated partial character strings; a function of determining a language to which the discovered character string of the at least one document file belongs; and a function of outputting a litigant document file based on the translation-related information. 18. The non-transitory recording medium of claim 11 , wherein the function of setting further includes a function of setting a browsing-only right.