Handle challenges with no Japanese content like #59

templates/index.html.tera

@@ -67,6 +67,7 @@
         <div>
             <div>
                 <h1>Welcome to Tegaki Tuesday #{{ challenge }}!</h1>
+                {% if content.japanese %}
                 <div lang="ja">
                     <script>
                         let kyujitai = false;
@@ -98,6 +99,7 @@
                         {% endfor %}
                     {% endfor %}
                 </div>
+                {% endif %}
                 {% if content.translation %}
                     <p>
                         Translation