Document Language
Checks that the document has a language attribute defined (e.g., <html lang="en">).
What is this check?
This check ensures that the main `<html>` tag has a `lang` attribute, which declares the primary language of the page.
Why is it important?
The `lang` attribute allows screen readers to switch to the correct language profile, ensuring proper pronunciation and accent.
What is the impact?
Without a language attribute, screen readers may use the wrong language to read the content, making it sound like gibberish.
Example Implementation
<html lang="en">
...
</html>