About

Version: WCAG 2.0+
Number: 3.1.1
Level: A
Applicability:
  • Text
Requirement:

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

Guidance:

Purpose

The purpose of this success criterion is to ensure that the language of the content is available to reading systems and assistive technologies so that they can best render the text content (e.g., to optimize text-to-speech playback).

How to Meet

Authors need to ensure that the primary language is specified both in the EPUB Package Document metadata (using xml:lang attributes and the dc:language element) and in any HTML and SVG documents with text content (using the xml:lang and/or lang attributes, as appropriate).

Additional Information

The following knowledge base pages provide more information about how to address this success criterion for publishing content: