app\lang\en\validation.php
"alpha_spaces"     	   => "The :attribute may only contain letters and spaces.",
 
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
 
app\start\global.php
require app_path().'/filters.php';
require app_path().'/helpers.php';
require app_path('/validate/CustomValidation.php');
require app_path('/validate/validators.php');
 
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
 
app\validate\validators.php
<?php
 
Validator::resolver(function($translator, $data, $rules, $messages){
	
    return new CustomValidation($translator, $data, $rules, $messages);
});
 
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
 
app\validate\CustomValidation.php
<?php
use Illuminate\Validation\Validator;
 
class CustomValidation extends Validator{
 
	/**
	 * Check if an input contains only alpha and spaces.
	 *
	 * @param	string	$attribute
	 * @param	mixed	$value
	 * @param	array	$parameters
	 * @return	boolean
	 */
	public function validateAlphaSpaces($attribute, $value, $parameters){
		
		return preg_match('/^[\pL\s]+$/u', $value);
	}
}
 
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
 
app\controllers\AccountController.php
		$rules = array(
			// 'expression' => 'required|alpha_spaces|max:90|min:3|unique:sayings'
			'expression' => 'required|alpha_spaces'
			// 'expression' => 'required|max:90|min:3|unique:sayings|alpha_spaces:'. $postData["expression"],
		);
		// var_dump($rules);
		
		$validator = Validator::make(Input::all(), $rules);