Have a read of the comments in:
xampp\apache\conf\extra\httpd-languages.conf
and see if any of that, along with some experimentation helps with your issue.
As you can see, it is not enough just to ask questions about non latin characters as the list of non latin character languages is quite comprehensive.
There is also a module in the httpd.conf file called:
#LoadModule charset_lite_module modules/mod_charset_lite.so
to be made active just remove the # from the start of the line.
But before you do anything with the above read the info on this experimental module here:
http://httpd.apache.org/docs/2.2/mod/mo ... _lite.html
Always try and give as much imformation as possible when asking questions on these forums. The responses are often quicker and much more acurate.
When ever you make changes in an Apache conf file you have to restart the server to have the changes take effect.
Also always backup the conf file before making any changes so you can easily and quickly revert to a known working configuration file.
Good luck with it!