1. A recognition dictionary evaluation apparatus, comprising: a calculation module configured to calculate, in response to an update of a recognition dictionary file in which feature amount data indicating appearance feature amount of each commodity is stored, a recognition rate by item of each commodity according to the feature amount data of the updated recognition dictionary file; an evaluation module configured to evaluate the recognition dictionary file based on the recognition rate by item of each commodity calculated by the calculation module; a detection module configured to detect, in a case in which the recognition dictionary file is evaluated to be improper by the evaluation module, a low recognition commodity of which a correct recognition rate that a commodity is correctly recognized from all commodities is lower than a given level, and an incorrect recognition commodity of which an incorrect recognition rate is high within the recognition rate by item of the low recognition commodity; and a notification module configured to notify the items of the low recognition commodity and the incorrect recognition commodity detected by the detection module.