Allow language spoofing in status messages
H1 user ryotac reported yet another variant of #30683 (closed), but this one is not covered by that patch because XSLT errors have their own separate bundle and displaying logic.
I believe in this case, rather than spoofing English in the error page, we should just match Chromium's behavior and just fail silently, displaying the untransformed document - and possibly fix upstream too, looking at this comment.