Basically, that is exactly what I am trying to do. However, rather than write a new function, I would like to extend the list used by DeleteStopwords[], that way the whole process is simplified. It's OK if this isn't possible, but I would like to understand:
1. How can I find/see the contents of the list that DeleteStopwords uses
2. Why I can't update it, i.e. is there something special about that list.