Windows 7: How to verify the system language with a command?

Hi all,
I have a question, need your help:
there are many computers in our company, including Chinese and English system.
Now I want to make a tool, a batch file, and I need to get the system language.
Which command can I use? systeminfo may be useful, but it takes too long time.
I try to read the folder name of desktop, but in a Chinese system, I also can use %userprofile%\desktop to enter the folder, so it doesn't work.
All the computers are installed with Windows 7.

Thanks for your kindly help in advance!

Regards.
Chenry

resolved.
if exist "%windir%\zh-cn"