11. The communication robot according to claim 10 , wherein the action adjustment unit comprises an end point coordinate setting unit that, if interference is generated in the pair of words, adjusts a shift amount of a position coordinate of an end point of a sign language action having the same meaning as the prior word of the pair of words, or an evaluation function calculated based on the shift amount, within a prescribed threshold range.
11. The communication robot according to claim 10 , wherein the action adjustment unit comprises an end point coordinate setting unit that, if interference is generated in the pair of words, adjusts a shift amount of a position coordinate of an end point of a sign language action having the same meaning as the prior word of the pair of words, or an evaluation function calculated based on the shift amount, within a prescribed threshold range. 14. The communication robot according to claim 11 , wherein the end point coordinate setting unit shifts the position coordinate of the end point of the sign language action having the same meaning as the prior word of the pair of words, such that a calculation result with respect to the prior word using a prescribed evaluation function regarding to which degree a word in a sign language action can be understood falls within a prescribed range within which the meaning of the prior word of the pair of words can be maintained.