If you email is already validated and you go to Special:ConfirmEmail, it shows the emailauthenticated message (which makes sense), confirmemail_text), and includes a button that allows you to validate your email.
The latter to make no sense. It is confusing to say, "Your email address was authenticated [...]" (emailauthenticated), but then "{{SITENAME}} requires that you validate your email address before using email features".
The whole page should fork based on whether the email is validated, and if it is, there should be no button. Presumably as a result of this oddity, English Wikipedia has an override which adds, "To check whether you have already confirmed, please see your preferences." Of course, that is just putting work onto the user.
While we're at it, we should consistently use "confirmed", rather than introduce another word ("authenticated") into the UI.
Version: 1.23.0
Severity: normal
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=45413