@PitaJ is correct, the option is called the "tags whitelist", and you can decide which tags to allow, and do so on a per-category basis
Problem with searching in admin panel.
Search in Admin Panel needs to input at least 3 characters.
But in Chinese, lot's of words only have 2 characters.
For example, "邮件"(Email) "用户"(User) "板块"(Categories).
So annoying when you want to find something.
I want to change the default "Post Sorting", and I can't just search "排序" in Chinese.
I need to change my language to English, refresh Admin page, then search "sort".
Hey, good catch. I've opened an issue on Github: https://github.com/NodeBB/NodeBB/issues/5563