Yesterday after uploading spanish language I was working fine with my admin and my zen cart, but today I am getting this error msg when trying to display the admin login page, please help:

Warning: require(includes/languages/spanish.php) [function.require]: failed to open stream: No such file or directory in .../store/admin/includes/init_includes/init_languages.php on line 31

Fatal error: require() [function.require]: Failed opening required 'includes/languages/spanish.php' (include_path='.:/usr/local/php5/lib/php') in ...store/admin/includes/init_includes/init_languages.php on line 31