.button button-secondary [href="/publish"] span {
  display:none;
}

.compose-form__submit .button {
  display: flex;
  font-size: 0;
}

.compose-form__submit .button::after,
.ui__header__links [href="/publish"]::after {
  content: 'Toot!';
  font-size: 1rem;
  display: block;
}