Thread:Extension talk:ConfirmAccount/How do I set language strings with the latest version?/reply

Reminder for anyone reading: system messages are translated on translatewiki.net.

If Special:AllMessages is not working, you have a bug. However, you can always look up the message keys in the extension's json files or on translatewiki.net and visit/edit them directly, for instance MediaWiki:requestaccount-page (of course on your wiki, not here). Can you link your wiki?