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# 3.1.1 Language of Page

- Level: A
- Guideline: 3.1 Readable
- Principle: 3 Understandable

## What it is

The default human language of each web page can be programmatically determined.

## How to test

- Check: The default human language of each web page can be programmatically determined.
- Use the sufficient techniques below as acceptable methods when applicable.

## Sufficient techniques (W3C)

- H57: Using the language attribute on the HTML element
- PDF16: Setting the default language using the /Lang entry in the document catalog of a PDF document
- PDF19: Specifying the language for a passage or phrase with the Lang entry in PDF documents

## Advisory techniques (W3C)

- SVR5: Specifying the default language in the HTTP header

## Resources

- WCAG 2.2 SC: https://www.w3.org/TR/WCAG22/#language-of-page
- Understanding: https://www.w3.org/WAI/WCAG22/Understanding/language-of-page.html
- Quick reference: https://www.w3.org/WAI/WCAG22/quickref/?versions=2.2#language-of-page

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