I had a question about changing the language for a user in the Client and EP. This is a simple process.
When you are in the client. Click the Dynamics button. Click Tool. Click Option.
On the user options form. On the General tab. Select Language
Select the language you need. e.g. in this case Chinese.
Click the Apply button on the form. And restart the client. It will now be in that language.
Both the client and the EP will reflect the user language.