Mailing subscriber (2.0.0-alpha1) - en to unknown language translation catalogue (6 entries)

en: Email address
target: 电子邮件地址

en: Mail
target: 邮件

en: Subscriber
target: 订阅者

en: Sign up
target: 注册

en: Broken
target: 损坏

en: Broken/Missing
target: 断开/丢失
