How to add one field in the entrance to the opencart site ??

Question

opencart

I wanted to add one field "phone". The field is added, but the inscriptions are not added.

<div class="form-group">
              <label class="control-label" for="input-telephone">{{  entry_telephone  }}</label>
              <input type="tel" name="telephone" value="{{ telephone }}" placeholder="{{ entry_telephone }}" id="input-telephone" class="form-control" />
            </div>

here is the code.

Answer 1

I added an inscription in the language section?
or connect in the controller