lang attribute
Definition
The lang attribute is an HTML attribute on the <html> tag that declares the primary language of the page (e.g. lang="en").
Plain English
It tells browsers, screen readers, and search engines what language your page is written in.
Why it matters
- Missing or wrong lang can hurt accessibility and hreflang signals.
- Screen readers use it to select the correct pronunciation.
- Search engines use it for language-specific indexing.