Meta Data & Search Engines

A couple of weeks ago I put the following into my IDNs page.

<meta name="description" xml:lang="en" lang="en" content="André  
Schappo's Internationalized Domain Names (IDNs) Page" />
<meta name="description" xml:lang="zh" lang="zh" content="小山的国 
际化域名网页" />

So far google, yahoo, baidu and sogou have not picked up on it or just  
ignored it.

Anyone know if search engines are (/should be) able to handle the  
different language meta descriptions? Are there recommendations/ 
standards on how search engines should handle them?

Thank you

André