Connector/Translation/TranslationHelper.php
public function getLanguageIdentifiers(TranslateableInterface $object)
    {
        $languages = [];

        foreach ($object->getTranslations() as $translation) {
            $languageIdentifier = $translation->getLanguageIdentifier();

            if (isset($languages[$languageIdentifier])) {
                continue;
            }

            $languages[$languageIdentifier] = $languageIdentifier;
        }

        return $languages;
    }
public function getLanguageIdentifiers(TranslateableInterface $object)
    {
        $languages = [];

        foreach ($object->getTranslations() as $translation) {
            $languageIdentifier = $translation->getLanguageIdentifier();

            if (isset($languages[$languageIdentifier])) {
                continue;
            }

            $languages[$languageIdentifier] = $languageIdentifier;
        }

        return $languages;
    }
@param TranslateableInterface $object

@return array