Was Nietzsche A Mute?

Was Nietzsche A Mute? Until his death in 1900 Nietzsche remained a mute invalid under the guardianship of his sister Elisabeth, a repulsive individual with whom he quarrelled bitterly when she married an antisemitic high school teacher, Bernhard Förster, and accompanied him to found an “Aryan” colony, Nueva Germania, in Paraguay. What does Nietzsche think