Make your class translate ready ! Symfony 4 translate aware trait.

TranslatorAwareTrait.php

namespace App\Core\Utils\Services;

use Symfony\Component\Translation\Exception\InvalidArgumentException;
use Symfony\Component\Translation\TranslatorInterface;

trait TranslatorAwareTrait
{
    /**
     * @var TranslatorInterface
     */
    protected $translator;

    /**
     * @required
     *
     * @param TranslatorInterface $translator
     */
    public function setTranslator(TranslatorInterface $translator)
    {
        $this->translator = $translator;
    }

    /**
     * Translates the given message.
     *
     * @param string      $id         The message id (may also be an object that can be cast to string)
     * @param array       $parameters An array of parameters for the message
     * @param string|null $domain     The domain for the message or null to use the default
     * @param string|null $locale     The locale or null to use the default
     *
     * @return string The translated string
     *
     * @throws InvalidArgumentException If the locale contains invalid characters
     */
    public function translate($id, array $parameters = array(), $domain = null, $locale = null)
    {
        return $this->translator->trans($id, $parameters, $domain, $locale);
    }
}