使用Django的admin本地化配置时遇到

ERRORS:
?: (translation.E004) You have provided a value for the LANGUAGE_CODE setting that is not in the LANGUAGES setting.

2.X版本没有出现异常，当前Django版本

添加相应的LANGUAGES

解决方法：

from django.utils.translation import gettext_lazy as _
LANGUAGES = [
('zh-Hans', _('Simplified Chinese')),
]

LANGUAGE_CODE = 'zh-Hans'