yueke/application/admin/lang/zh-cn/messagesys.php

<?php

return [
    'Id'         => 'ID',
    'Title'      => '消息标题',
    'Info'       => '消息内容',
    'Createtime' => '创建时间',
    'Is_index'   => '放到首页',
    'Is_index 0' => '否',
    'Is_index 1' => '是'
];