Does not Register Arabic Menu

Hello,

I am trying yo use the addon on an Arabic website (” http://wordpress.alliancetradingca.com/Car/ “) The problem is it keeps giving me this error:

Warning: sprintf() [function.sprintf]: Too few arguments in /home/ryan88/public_html/wordpress/Car/wp-includes/nav-menu-template.php on line 231

Is the problem that it does not recognize the characters and is seeing the menu as void?

http://ww.wp.xz.cn/extend/plugins/responsive-select-menu/