使用环境如下：
osx10.9.2
python 2.7
mysql 5.5.29
django 1.6.11
在127.0.0.1/admin打开什么都正常，但是在settings.py中添加'django.middleware.locale.LocaleMiddleware',后，；将django重新启动(sudo python manage.py runserver 80)后，显示 的还是英文，恳请指出我哪个环节出的问题，应该怎样修改？谢谢！
settings.py部分配置：
INSTALLED_APPS = (
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'books',
)
MIDDLEWARE_CLASSES = (
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.locale.LocaleMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware',
)
ROOT_URLCONF = 'mysite.urls'
LANGUAGE_CODE = 'en-us'
TIME_ZONE = 'Asia/Shanghai'
USE_I18N = True
USE_L10N = True
USE_TZ = True
STATIC_URL = '/static/'
