Element-ui使用国际化i18n时报错

Question

vue中引入element-ui的i18n国际化，代码如下：

import zhCNLocale from 'element-ui/lib/locale/lang/zh-CN'
export default {
    ...zhCNLocale,
    next: "下一步",
    submit: "提交",

但是一直报错

Module parse failed: Unexpected token (5:1)
You may need an appropriate loader to handle this file type.
|
| export default {
|       ...zhCNLocale,
|       next: "下一步",
|       submit: "提交",

 @ ./src/providers/lang-provider.js 4:0-48
 @ ./src/main.js
 @ multi (webpack)-dev-server/client?http://localhost:8080 webpack/hot/dev-server ./src/main.js

请问，这个是什么原因？