import json
import os

lang = params.get('lang', 'zh')
i18n_dir = os.path.join(os.path.dirname(__file__), 'i18n', lang)
i18n_file = os.path.join(i18n_dir, 'i18n.json')

if os.path.exists(i18n_file):
    with open(i18n_file, 'r', encoding='utf-8') as f:
        msgs = json.load(f)
else:
    msgs = {}

return json.dumps(msgs, ensure_ascii=False)