Rocket Validator automatically checks your pages on the W3C Validator.
HTML issues tagged as isolang.
Instead of using the
isolang attribute to define the language of the document, you can use
lang with an ISO 639-1 two character code.
For example, for Portuguese:
25,000 HTML checks per month. Is that enough for your site?
Save time using our automated web checker. Let our crawler check your web pages on the W3C Validator.