How to add Attributes to the input tag of a field
If you can write your own module, you can implement the hook_form_alter:

function my_module_form_alter(&amp;$form, &amp;$form_state, $form_id) {
  if ($form_id == 'the_form_i_want_to_change') {
    $form['the_field']['#attributes']['autocorrect'] = 'off';
    $form['the_field']['#attributes']['autocapitalize'] = 'off';
    $form['the_field']['#attributes']['spellcheck'] = 'false';
  }
}