如何在beego模板循环中解析i18n字段？

Question

如果我在range语句中使用i18n语句，则会得到一个模板Execute err。但是我将i18n语句移到range语句之外。没关系。 错误消息是：

 [D] [controller.go:283]  template Execute err: template: userscontroller/get.tpl:16:244: executing "userscontroller/get.tpl" at <.Lang>: can't evaluate field Lang in type models.Account
[E] [server.go:2694]  template: userscontroller/get.tpl:16:244: executing "userscontroller/get.tpl" at <.Lang>: can't evaluate field Lang in type models.Account

这是我的示例代码：

<ul class="w3-ul" id="UserList">
        {{range $index, $user := .Users}}

        <li class="w3-bar w3-hover-light-blue {{if eq $user.Role  1}}w3-pale-green{{end}} {{if eq $user.Role  2}}w3-pale-blue{{end}}{{if eq $user.Role  3}}w3-pale-red{{end}}" onclick="openProfile(this,{{$user.Uid}})">

          <div class="w3-bar-item">
            {{if eq $user.Role  1}}<span class="w3-large" style="color:green;    font-weight: bold;">{{i18n .Lang ".users.administrator"}}</span>{{end}}{{if eq $user.Role  2}}<span class="w3-large" style="color:blue;    font-weight: bold;">{{i18n .Lang ".users.user"}}</span>{{end}}{{if eq $user.Role  3}}<span class="w3-large" style="color:red;    font-weight: bold;">{{i18n .Lang ".users.inactivated"}}</span>{{end}}<span class="w3-large Last">{{$user.Last}}</span> <span class="w3-large First">{{$user.First}}</span><br>
            <span>{{i18n .Lang ".users.email"}}</span><span class="Email">{{$user.Email}}</span>
          </div>
        </li>
        {{end}}


    </ul>

有人遇到过类似的问题吗？怎么解决，谢谢。