htaccess Elite

Hello,

Thank you in advance for your help.

I have a very serious problem that calls for me to block all user agents that use a specific language. In the following example from my logs, the "en-US" stands for "English."

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Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.1) Gecko/20061204 Firefox/2.0.0.1
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Now, let's say I want to block Chinese ("CH"). How can I do that in htaccess?