askvortsov Thank you very much for pointing out the extension.
I'm a self-taught techie but non-coder; with some tweaking, it still doesn't work for a new user to register with Chinese characters.
Could you take a look and help tweak the code to allow a user to register with pure Chinese characters (李小龙), pure English characters (Tom), or a mix of Chinese and English characters (Tim王), please?
https://nimb.ws/WntL0p
^[\u4e00-\u9fa5]+$|^[a-zA-Z\s]+$