You do not need to download a language pack for the language you installed, these language packs are to support creation of additional languages.

例如，我最开始装MOSS的时候安装的是中文版，现在需要做一个中英文的多语言站点，那么就需要下载英语版的语言包.下载语言包安装、重新运行sharepoint技术向导。这些，我们的sharepoint就可以创建多语言的网站了。

youdao

You do not need to download a language pack for the language you installed, these language packs are to support creation of additional languages.

例如，我最开始装MOSS的时候安装的是中文版，现在需要做一个中英文的多语言站点，那么就需要下载英语版的语言包.下载语言包安装、重新运行sharepoint技术向导。这些，我们的sharepoint就可以创建多语言的网站了。

youdao