11. A dictionary production aiding apparatus as recited in claim 10, wherein said means for positioning the input position includes means for displaying said first form on said input region, means for specifying a part of speech categorizing said target morpheme, means for estimating a location with the highest estimated possibility that the form of said second morpheme is different from the form of said first morpheme depending upon the kind of said specified part of speech, and means for positioning the input position at a corresponding position on said input region based on the result of estimation by said estimation means.
11. A dictionary production aiding apparatus as recited in claim 10, wherein said means for positioning the input position includes means for displaying said first form on said input region, means for specifying a part of speech categorizing said target morpheme, means for estimating a location with the highest estimated possibility that the form of said second morpheme is different from the form of said first morpheme depending upon the kind of said specified part of speech, and means for positioning the input position at a corresponding position on said input region based on the result of estimation by said estimation means. 12. A dictionary production aiding apparatus as recited in claim 11, wherein said means for specifying a part of speech categorizing said target morpheme includes means for displaying a list of available parts of speech, and means for allowing the user to select one part of speech from said list.