JSFiddle - React, Tailwind, and code Playground

HTML

<select name="selectmenu" id="selectmenu">
  <option value="english">English</option>
  <option value="french">French</option>
</select>


<div data-role="page" id="AppartmentPage" class="page">
  <h1 class="TopText" align="center" id="AppartmentT">Appartment</h1>
  <h1 class="BotText" align="center" id="AppartmentB">Appartment</h1>
</div>

JavaScript

$("#selectmenu").on('change', function() {
  var chosenLanguage = $(this).val();
  switch (chosenLanguage) {
    case 'french':
      $('#AppartmentB').text('Maison');
      break;
    case 'english':
      $('#AppartmentB').text('Appartment');
      break;
  }
});