Answer:They have a language.
Explanation: The horses are called “Houyhnhnms” they are rational creatures which are capable of speech and thought ( language). Gulliver was however surprised how the Houyhnhnms are capable of communicating with each other. Furthermore, the Houyhnhnms has a representative council which takes place every four years, the council was created to keep balance in the Houyhnhnms society. However the Houyhnhnms have no written language , their knowledge is passed down orally