Resolve third party login i18n

upstream MR

What does this MR do and why?

• Fix translation on omniauth_error page
• Fix translation for terms message

Screenshots or screen recordings

Before	After

How to set up and validate locally

1. Register a new user on JiHu
2. Register a new user on GitHub with the same email from previous step
3. Goto sign up page on JiHu
4. Click on GitHub button
5. You should see the omniauth_error page is translated into :zh_CN

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #1208 (closed)