Rocket Validator logo

Accessibility checking

Rocket Validator looks for accesibility violations on your pages using the axe-core accessibility engine, hosted on our own servers and integrated into our web crawler. You don't need to buy an additional license, everything's already included in your Pro account at Rocket Validator.

A11Y check: HTML element must have a valid value for the lang attribute

Accessibility rule: The HTML document must contain a valid lang attribute or must correspond to a valid lang code for multilingual screen reader users who may prefer a language other than the default.

Learn more about this A11Y rule at Deque University >>

Validate accessibility and HTML5 on large sites, starting at $12/week. Start here