默认语言修改为cn(close #2)

Signed-off-by: Arathi <ssdfa7@gmail.com>
修改一些翻译

Signed-off-by: Arathi <ssdfa7@gmail.com>
添加了一个C++程序，用于去掉不需要的语言

Signed-off-by: Arathi <ssdfa7@gmail.com>