WCAG 2.0 · Level A · Understandable
WCAG 3.1.1 — Language of Page
The default human language of the page must be set in the HTML lang attribute.
WCAG 3.1.1 at a glance
Level A · Principle: Understandable · Added in WCAG 2.0. Level A is the minimum — failing it blocks some users entirely.
What it means
The default human language of the page must be set in the HTML lang attribute.
Who it helps
Screen-reader users (correct pronunciation) and translation tools.
Common failures
- Missing or wrong <html lang> attribute
How to meet WCAG 3.1.1
- Set lang on the <html> element (e.g. lang="en")
How to test it
Automatable — check for a valid lang attribute.