book_admin/application/admin/lang/zh-cn/auth/authswitch.php

<?php

return [
    'Username' => '用户名',
    'Nickname' => '昵称',
    'Admin_ids'  =>  '绑定关系',
    'Createtime'  =>  '添加时间',
    'Add' => '绑定账号',
    'Delete' => '解除绑定',
    'Switch' => '切换账号',
    'Passwd' => '密码'
    ];