devise message not listed in locale file
You have signed up successfully. However, we could not sign you in because your account is unconfirmed.
很玄妙的一個字串, 翻遍了 locale 檔都找不到. 本來想說是靈異現象. 再度上網拜神, 發現原來還需要自己多加一項在 registrations 下
inactive_signed_up: '你已成功註冊,請至您的信箱收取認證信,開通帳號。'
問題解決,可喜可樂。