3.1 Readable · Understandable

WCAG 3.1.1 Language of Page

Level A

Each page must declare its primary language via the `lang` attribute on `<html>`, so screen readers pick the right voice profile and pronunciation.

Common failures

`<html>` has no `lang` attribute.
Sites set `lang="en"` despite Portuguese-language content.

How to fix

Set `<html lang="en">` (or `pt`, etc.) at the layout level.
When content is auto-detected as the wrong language, override via `lang`.

Related criteria

WCAG 3.1.2 Language of Parts Level AA