All classes that implement TranslatorInterface

class \Drupal\Core\StringTranslation\TranslationManager implements TranslatorInterface
class \Drupal\Core\StringTranslation\Translator\CustomStrings
class \Drupal\Core\StringTranslation\Translator\FileTranslation
class \Drupal\Core\StringTranslation\Translator\StaticTranslation implements TranslatorInterface
class \Drupal\locale\LocaleTranslation implements DestructableInterface, TranslatorInterface