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The resolution of Bug #790 adds an interface for direct choice of the language of the validation results, by adding the lang parameter to the query string. Should there be a user interface to give access to these? on the validator's homepage, links to "this page is also available in @{languages}", perhaps a drop-down in the interface to set the language of the results... With, obviously, a default for "automatic", ie language-negotiated.
fixed in CVS by Julien.