eZ\Publish\API\Repository\ContentTypeService: '@ezpublish.siteaccessaware.service.content_type'

class UserLanguagePreferenceListener implements EventSubscriberInterface
{
    // ...
    public function onKernelRequest(GetResponseEvent $event): void
    {
        $languages = $this->userLanguagePreferenceProvider->getPreferredLanguages();

        if (empty($languages)) {
            return;
        }

        $this->languageResolver->setContextLanguage(
            $languages[0]
        );
    }
}