Python - Translator using Google Translate API

from google.cloud import translate_v2
from conf import staticConfigs
import html
from time import sleep

class Translator:
    def __init__(self):
        self.conf = staticConfigs()
        self.user_key = self.conf.google_path_userkey
        self.project_id = self.conf.google_project_id
        self.parent = f"projects/{self.project_id}"
        self.client = translate_v2.client.Client.from_service_account_json(json_credentials_path=self.user_key)
        self.sleep_in_between_translations_seconds = self.conf.sleep_in_between_translations_seconds
        self.source_language = "en"

    def __htmlDecode(self, item):
        if type(item) is list:
            res = []
            for i in item:
                res.append(html.unescape(i))
        elif type(item) is str:
            return html.unescape(item)

    def Translate(self, content, dest_language_code):
        res = self.client.translate(content, target_language=dest_language_code)
        print('Sleeping for {}s after translation query..'.format(self.sleep_in_between_translations_seconds))
        sleep(self.sleep_in_between_translations_seconds)
        return self.__htmlDecode(res['translatedText'])