A save after the session ran out, or into a rate limit, showed the form's
generic "could not save". The server already names both refusals in
meta.errorCode (auth.missing for an ended web session, the status codes
http.rate_limited, http.forbidden and http.invalid otherwise), but the
catalogs had no sentence for them, so the lookup fell through to the
fallback. They have one now in all ten locales, and a refusal that
reaches the client without a code (a reverse proxy's 429) is read by its
status the way the server labels it.