dataTablesの日本語化

前提・実現したいこと

dataTablesを使用しHTMLを作成しているのですが、日本語化をすることができません。
ご教授のほどお願い致します。

該当のソースコード

javascript
1window.addEventListener('DOMContentLoaded', event => {
2    // Simple-DataTables
3    // https://github.com/fiduswriter/Simple-DataTables/wiki
4
5    const datatablesSimple = document.getElementById('datatablesSimple');
6    if (datatablesSimple) {
7        new simpleDatatables.DataTable(datatablesSimple);
8    }
9});
10
11

html
1{% load static %}
2<!DOCTYPE html>
3<html lang="ja">
4    <head>
5        <meta charset="utf-8" />
6        <meta http-equiv="X-UA-Compatible" content="IE=edge" />
7        <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no" />
8        <meta name="description" content="" />
9        <meta name="author" content="" />
10        <title>Reward Management</title>
11        <link href="https://cdn.jsdelivr.net/npm/simple-datatables@latest/dist/style.css" rel="stylesheet" />
12        <link href="{% static 'styles.css' %}" rel="stylesheet" />
13        <script src="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.15.3/js/all.min.js" crossorigin="anonymous"></script>
14    </head>
15    <body class="sb-nav-fixed">
16
17                <main>
18                   <div class="card-body">
19                      <table id="datatablesSimple">
20                         <tbody>
21                            <tr>
22                               <td>data1</td>
23                               <td>data2</td>
24                               <td>data3</td>
25                               <td>data4</td>
26                            </tr>
27                         </tbody>
28                      </table>
29                   </div>
30                </main>
31            </div>
32        </div>
33        <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.0/dist/js/bootstrap.bundle.min.js" crossorigin="anonymous"></script>
34        <script src="{% static 'scripts.js' %}"></script>
35        <script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.8.0/Chart.min.js" crossorigin="anonymous"></script>
36        <script src="https://cdn.jsdelivr.net/npm/simple-datatables@latest" crossorigin="anonymous"></script>
37        <script src="{% static 'datatables-simple-demo.js' %}"></script>
38        <script src="https://cdn.datatables.net/1.10.21/js/jquery.dataTables.min.js"></script>
39    </body>
40</html>
41
42});
43
44

試したこと

html
1<script src="https://cdn.datatables.net/1.10.21/js/dataTables.bootstrap4.min.js"></script>
2<script>
3  $(function () {
4  // datatableの設定を変更
5　　 $("#datatablesSimple").DataTable({
6        "language": {
7    　     "url": "https://cdn.datatables.net/plug-ins/1.10.16/i18n/Japanese.json"
8      　 }
9      });
10  })
11</script>