def __get_language_data(self, bundleId, languageId, fallback=False):
        """``GET /{serviceInstanceId}/v2/bundles/{bundleId}/{languageId}``

        Gets the resource strings (key/value pairs) for the language. If
        ``fallback`` is ``True``, source language value is used if translated
        value is not available.
        """
        url = self.__get_base_bundle_url() + '/' + bundleId + '/' + languageId
        params = {'fallback': 'true'} if fallback else None
        response = self.__perform_rest_call(requestURL=url, params=params)

        if not response:
            return None

        languageData = response.get(self.__RESPONSE_RESOURCE_STRINGS_KEY)

        return languageData
``GET /{serviceInstanceId}/v2/bundles/{bundleId}/{languageId}``

        Gets the resource strings (key/value pairs) for the language. If
        ``fallback`` is ``True``, source language value is used if translated
        value is not available.