Thread:Support/About Wikia:Usersignup-account-creation-email-sent/tl/reply (3)

As your source points out, it is debatable whether the singular they is correct English. I'm not aware of it being taught in any English course, and it has no equivalent in any other language I know of. Many people apparently don't know about it and translate it as a literal plural; as I have a bunch of assistant languages configured, I notice incorrect plural translations of the singular they all the time. This is an ongoing problem. Every instance of the singular they should probably be documented. I just created a template to facilitate that.