add lan reload

demo.html

@@ -24,8 +24,8 @@
                   中/En
               </a>
               <ul class="dropdown-menu" aria-labelledby="navbarDropdown">
-                  <li><button class="nav-link lan-switch" aria-current="page" set-lan="html:en" onclick="changeLan(this)" value="en">English</button></li>
-                  <li><button class="nav-link lan-switch" aria-current="page" set-lan="html:zh" onclick="changeLan(this)" value="zh">中文</button></li>
+                  <li><button class="nav-link lan-switch" aria-current="page" set-lan="html:en" onclick="changeLan(this);window.location.reload();" value="en">English</button></li>
+                  <li><button class="nav-link lan-switch" aria-current="page" set-lan="html:zh" onclick="changeLan(this);window.location.reload();" value="zh">中文</button></li>
               </ul>
           </li>
       </ul>