Method and system for managing a common dictionary and updating dictionary data selectively according to a type of local processing system

A common dictionary management system that can reduce the work of data registration into dictionaries. Exchange data generated in any local dictionary of a natural language processing system is sent to the local dictionaries of other natural language processing systems automatically. A local dictionary management portion and a common dictionary management portion collect updated dictionary data from a plurality of local dictionaries and updating time information. The local dictionary management portion updates the common dictionary and the local dictionaries according to the collected dictionary data and the time information. The local dictionary management portion compares the information with the latest time on which dictionary data was distributed to the local user dictionaries with the updating time information of the dictionary data in the common dictionary to distribute the dictionary data of the common dictionary selected according to the result of the comparison, to the local dictionaries.