Page lang is invalid Accessibility Checkpoint


Page lang attribute contains an invalid language.


A BCP 47 lang attribute consists of hyphen-separated subtags. The first subtag identifies a natural language by its ISO 639 language code (e.g. en for English) and may be followed by additional subtags. The most common additional subtag is a two-letter ISO 3166 country code (e.g. US for the United States to form en-US). IANA maintains a registry of allowed subtags. A empty lang attribute is allowed (and means unknown language) but a lang containing only spaces is not allowed and causes a random language to be selected in a screen reader.

Applicable standards

Note: Section 508 Refresh (2017) checkpoints are equivalent to WCAG 2.0 level A and level AA checkpoints.

Change history

  • 6.40 Jan 2021 Added - split from HTML W3cHtml5Error-RnvErAval-lang.

This page describes a web site issue detected in HTML documents by SortSite Desktop and OnDemand Suite.

Rule ID: AccHtmlPageLangInvalid