It may be that Herbal-B is a mixture of the other two languages,
      so the words that we see in the list above is mostly the
      intersection of the two vocabularies.  To see what I mean,
      consider mixing equal parts of two hypothetical languages X and
      Y with the following (Zipf-like) word distributions:
      
          Lang.X       Lang.Y       Mixture
          --------     --------     ---------
          0.44 xuxa    0.44 yoyo    0.22 xuxa
          0.22 xenon   0.22 young   0.22 yoyo
          0.14 xiang   0.14 yaks    0.12 foobar
          0.12 foobar  0.12 foobar  0.11 xenon
          0.08 xerox   0.08 yield   0.11 young
                                    0.04 xerox
                                    0.04 yield
                                    
      Note that mixing caused the shared word "foobar" to became more
      popular than "xexeo" and "yang".  Of the non-shared words,
      only the front-runners "xuxa" and "yoyo" retained their 
      leading positions, because of their large Zipf advantage