13. A computer readable medium that stores a program for executing a document processing method comprising: a first word extracting step for extracting a first word from document data; a preceding/subsequent word extracting step for extracting, from the document data, a second word that is one of a preceding word and a subsequent word of the first word; a keyword extracting step for extracting a keyword of the document data, based on a frequency of occurrence of the first word, wherein said keyword extracting step includes a word counting step of counting a number of occurrences of each word, other than unnecessary words which are pre-excluded from being keywords, in the document data, said keyword extracting step extracting a word having a high number of occurrences, counted by said word counting step, as the keyword; and a translation step for translating the keyword into a predetermined language by referring to a dictionary in a process that considers a meaning of the first and second words existing together in the document data.
13. A computer readable medium that stores a program for executing a document processing method comprising: a first word extracting step for extracting a first word from document data; a preceding/subsequent word extracting step for extracting, from the document data, a second word that is one of a preceding word and a subsequent word of the first word; a keyword extracting step for extracting a keyword of the document data, based on a frequency of occurrence of the first word, wherein said keyword extracting step includes a word counting step of counting a number of occurrences of each word, other than unnecessary words which are pre-excluded from being keywords, in the document data, said keyword extracting step extracting a word having a high number of occurrences, counted by said word counting step, as the keyword; and a translation step for translating the keyword into a predetermined language by referring to a dictionary in a process that considers a meaning of the first and second words existing together in the document data. 18. A medium according to claim 13, wherein said preceding/subsequent word extracting step includes a step for counting a number of occurrences of each preceding word, which precedes each word in the document data, and a number of occurrences of each subsequent word, which follows each word in the document data, said preceding/subsequent word extracting step selecting preceding and subsequent words having highest counted numbers of occurrences as the preceding and subsequent words of the first word.