1. A data creating apparatus configured to create learning data for learning proper usage of a plurality of translation candidates corresponding to one word in a source language, the translation candidates being described in a target language, the data creating apparatus comprising: an input unit configured to input a sentence in the source language; a translation generating unit configured to translate one word in the sentence into the target language based on a predetermined translation rule, and generate a plurality of translation candidates in the target language with respect to the word and likelihood expressing probability of the translation candidate; a correspondence-information creating unit configured to create a plurality of correspondence information, each correspondence information including the word and one of the translation candidates; a determining unit configured to determine whether the likelihood of the translation candidate is larger than a predetermined threshold value; a learning-data creating unit configured to create the learning data in which another word in the sentence is added to the correspondence information of the translation candidate having the likelihood larger than the threshold value; a dictionary storage unit configured to store a bilingual dictionary in which a word in the source language and the translation candidate with respect to the word in the source language are associated with each other; and a translation rule storage unit configured to store the translation rule in which the word in the source language, a word having a dependency relationship with the word in the source language, and the translation candidate are associated with each other, wherein the data creating apparatus further comprises a processor for executing at least the correspondence-information creating unit, and wherein the translation generating unit includes: a morphological analysis unit configured to perform morphological analysis with respect to the sentence to divide the sentence into words; a translation obtaining unit configured to obtain the translation candidate with respect to the divided word from the dictionary storage unit; a dependency analysis unit configured to analyze the dependency relationship between the divided words; and a translation unit configured to collate the divided word and a word having the dependency relationship with the divided word, with the word in the source language and the word having the dependency relationship with the word in the source language, respectively, in the translation rule stored in the translation rule storage unit for each divided word, and obtain a matched translation candidate associated with the word in the source language in the translation rule from the translation rule storage unit.