Org-mode tags with special characters

According to the Org-mode documentation, ‘Tags are normal words containing letters, numbers, ‘_’, and ‘@’.’

Is it possible to use other special characters, in addition to ‘_’ and ‘@’? For example, apostrophes (‘'’) or hyphens (‘-’). Emacs Lisp tends to use hyphens as a delimiter, so it seems elegant to continue using them in Org-mode.

I found this post, but it is from a while ago.

Not a big deal, I can just use underscores otherwise, but would be nice to have.