Add this to your realUrl configuration
array ( 'init' => array ( ... // Allow chinese chars in url // otherwise realUrl converts all to ASCII 'enableAllUnicodeLetters' => true, 'doNotRawUrlEncodeParameterNames' => true, ... ), ...
Links
http://www.arxia.com/blog/2012/09/how-to-configure-a-typo3-website-for-arabic-language/