With that said, Here it is.
The Chinese (Simplified) Language File
To Install the .ifl language file go to the language tab and click Import

Navigate to where you extracted the .fl Language File and Open it.

The language file will show in the Lange tab but you will also have to throw the file in the Install Forge Language folder


After you place the file in the Install Forge Language folder you will be able to build installs with the Chinese Langage

Enjoy!