I see what you are saying and you are right... But smaller, less played, more "niche" races could just not have ALL that much dialog tag options. Makes sense a Chitine, Tortle, Centaur or Minotaur (less civilized races, and more monstrous) and many more share a common "savage rare monstrous race" dialog tag option (or something like that), since that by being barbaric they will not have all THAT much in terms of culture and all of them would have appearances that would make people feel uneasy...
Not only that but it would be time consuming for artists and designers to make those races playable. And I think Larian has plenty of other areas of development in which asset assignments are more dire than this.