Added error message in lang file.

Signed-off-by: Sajan Parikh <sajan@noppix.com>
diff --git a/system/language/english/form_validation_lang.php b/system/language/english/form_validation_lang.php
index 3fb007d..476123b 100644
--- a/system/language/english/form_validation_lang.php
+++ b/system/language/english/form_validation_lang.php
@@ -28,20 +28,21 @@
 
 $lang['form_validation_required']		= 'The {field} field is required.';
 $lang['form_validation_isset']			= 'The {field} field must have a value.';
-$lang['form_validation_valid_email']		= 'The {field} field must contain a valid email address.';
-$lang['form_validation_valid_emails']		= 'The {field} field must contain all valid email addresses.';
+$lang['form_validation_valid_email']	= 'The {field} field must contain a valid email address.';
+$lang['form_validation_valid_emails']	= 'The {field} field must contain all valid email addresses.';
 $lang['form_validation_valid_url']		= 'The {field} field must contain a valid URL.';
 $lang['form_validation_valid_ip']		= 'The {field} field must contain a valid IP.';
 $lang['form_validation_min_length']		= 'The {field} field must be at least {param} characters in length.';
 $lang['form_validation_max_length']		= 'The {field} field cannot exceed {param} characters in length.';
-$lang['form_validation_exact_length']		= 'The {field} field must be exactly {param} characters in length.';
+$lang['form_validation_exact_length']	= 'The {field} field must be exactly {param} characters in length.';
 $lang['form_validation_alpha']			= 'The {field} field may only contain alphabetical characters.';
-$lang['form_validation_alpha_numeric']		= 'The {field} field may only contain alpha-numeric characters.';
+$lang['form_validation_alpha_numeric']	= 'The {field} field may only contain alpha-numeric characters.';
+$lang['form_validation_alpha_numeric_spaces']	= 'The {field} field may only contain alpha-numeric characters and spaces.';
 $lang['form_validation_alpha_dash']		= 'The {field} field may only contain alpha-numeric characters, underscores, and dashes.';
 $lang['form_validation_numeric']		= 'The {field} field must contain only numbers.';
 $lang['form_validation_is_numeric']		= 'The {field} field must contain only numeric characters.';
 $lang['form_validation_integer']		= 'The {field} field must contain an integer.';
-$lang['form_validation_regex_match']		= 'The {field} field is not in the correct format.';
+$lang['form_validation_regex_match']	= 'The {field} field is not in the correct format.';
 $lang['form_validation_matches']		= 'The {field} field does not match the {param} field.';
 $lang['form_validation_differs']		= 'The {field} field must differ from the {param} field.';
 $lang['form_validation_is_unique'] 		= 'The {field} field must contain a unique value.';