1. A sign language translation system, comprising: input means for inputting motion of hands as electric signals; sign language word generating means for recognizing words in accordance with said input electric signals and generating sign language words; storage means for storing conjugations or translations of said generated sign language words and postpositions or auxiliary verbs to be supplemented between said generated sign language words; dependence analyzing means for analyzing a dependence relationship between successive ones of said recognized words in accordance with said stored translations of said recognized words and outputting analyzed results; spoken language generating means for generating, in accordance with said analyzed results, an audibly communicated sentence by supplementing said stored postpositions or auxiliary verbs and providing said stored conjugations of conjugative words; and output means for outputting said generated spoken language.