2. The speech processing device according to claim 1 , further comprising pattern determination means for determining whether the result of the recognition matches a predetermined word sequence, wherein the registering means registers the word if the result of the recognition matches the predetermined word sequence.
2. The speech processing device according to claim 1 , further comprising pattern determination means for determining whether the result of the recognition matches a predetermined word sequence, wherein the registering means registers the word if the result of the recognition matches the predetermined word sequence. 3. The speech processing device according to claim 2 , further comprising reply generating means for generating a reply signal corresponding to the input utterance when the unknown word determination means determines that the result of the recognition does not contain an unknown word or the pattern determination means determines that the result of the recognition does not match the predetermined word sequence.