diff --git a/extensions/lang-english/locale/core.yml b/extensions/lang-english/locale/core.yml
index d2be135a5..0bd774488 100644
--- a/extensions/lang-english/locale/core.yml
+++ b/extensions/lang-english/locale/core.yml
@@ -464,6 +464,7 @@ core:
       csrf_token_mismatch: You have been inactive for too long.
       csrf_token_mismatch_return_link: Go back, to try again
       forbidden: You do not have permission to access this page.
+      invalid_confirmation_token: This confirmation link has already been used or is invalid.
       not_found: The page you requested could not be found.
       not_found_return_link: "Return to {forum}"
       unknown: An error occurred while trying to load this page.