Thread:Support/List of all translations of a message in new interface/reply

If you mean that you want a link, there's no hope for that. Actually they want to progressively kill the appearance of message keys altogether. Your best bet is, as always, use Special:Translations and paste the message key in it; in the (rather near) future, we'll have Bug 46793 – Provide access to translations in other languages, so you'll only have to scroll a (fair) bit on the right side and then open the link.