Laravel get translated validation errors

I use Laravel 5.1, I want to return translated validation error in this request class. please any help how to return translated data. `class ContactRequest extends Request {

public function authorize()
{
    return true;
}


public function rules()
{
    return [
        'name' => 'required',
        'g-recaptcha-response' => 'required|captcha',
        'email' => 'required|email',
        'message' => 'required',
        'phone' => 'required'
    ];
}

}`

via Chebli Mohamed