How to display webpages in other languages ( not listed in Extention Manager )?

Change two files as following.  Then, webpages and contents can be edited and displayed in any unicode languages:

1) localconf.php in directory typo3conf

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$TYPO3_CONF_VARS["BE"]["forceCharset"] = 'utf-8'; // Modified or inserted by TYPO3 Install Tool.
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2) template.php in directory typo3

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   // INTERNAL
   // var $charset = 'iso-8859-1'; // Default charset. see function initCharset()
   var $charset = 'utf-8'; // charset to utf-8
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