Rocket Validator automatically checks your pages on the W3C Validator.
HTML issues tagged as ISO 639-1.
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:
Still checking your large sites one page at a time?
Save time using our automated web checker. Let our crawler check your web pages on the W3C Validator.