11. A system for supporting a creation of a dictionary for a translation system which translates a first language into a second language, comprising: means for entering a first language document and a corresponding second language document; means for extracting each first language character string to be registered in the dictionary from the first language document entered by the entering means; means for selectively extracting each corresponding second language character string with respect to each first language character string from the corresponding second language document according to a level of correspondence between a section of the first language document from which each first language character string is extracted and a section of the corresponding second language document to which each corresponding second language character string belongs, by morphologically and syntactically analyzing the first language document and the second language document; and means for selectively outputting each first language character string extracted by the extracting means along with each corresponding second language character string extracted by the selectively extracting means as a candidate for a registration knowledge to be registered in the dictionary according to the level of correspondence.
11. A system for supporting a creation of a dictionary for a translation system which translates a first language into a second language, comprising: means for entering a first language document and a corresponding second language document; means for extracting each first language character string to be registered in the dictionary from the first language document entered by the entering means; means for selectively extracting each corresponding second language character string with respect to each first language character string from the corresponding second language document according to a level of correspondence between a section of the first language document from which each first language character string is extracted and a section of the corresponding second language document to which each corresponding second language character string belongs, by morphologically and syntactically analyzing the first language document and the second language document; and means for selectively outputting each first language character string extracted by the extracting means along with each corresponding second language character string extracted by the selectively extracting means as a candidate for a registration knowledge to be registered in the dictionary according to the level of correspondence. 18. The system of claim 11, wherein the selectively outputting means outputs each first language character string and each corresponding second language character string in any of an order of appearances of each first language character string in the first language document, an order in which the first language character strings are sorted, an order of frequency of appearances of each first language character string in the first language document, and an order of certainty levels of the first language character strings.