This is an archived snapshot of W3C's public bugzilla bug tracker, decommissioned in April 2019. Please see the home page for more details.
In order to make the validator easier to localize, the main script should not include any (English) text, at the exception of language-aware routines (e.g a localization routine for "Invalid", "3 Errors", "2 Warnings")
I believe that's pretty much done, the only remaining text appear to be fatal errors caught during configuration reading, which would rather obviously be hard to move to templates. Reopen if any other inline text is found in check.