Change Default Validation Messages in Laravel
If you want to change default validation error message for specific field and specific validation rule, just add a messages() method into your FormRequest class.
class StoreUserRequest extends FormRequest
{
      public function rules()
      {
          return ['name' => 'required’];
     }
     public function messages()
     {
             return [
                      'name.required' => 'User name should be real name',
             ];
    }
}