Natural Language [WCAG.PDF.16]
Test Basis (WCAG 2.0)
This test is based on the WCAG 2.0 Technique PDF16: Setting the default language using the /Lang entry in the document catalog of a PDF document
Technique URL (WCAG 2.0)
Why this maybe a Barrier
If the natural language of a document is not known, users of screen reading software such as blind people or people with reading difficulties, will encounter problems. The pronunciation of the text might be distorted for example if a Norwegian text is read with English pronunciation.
WCAG 1.0 Reference
4.1 “Clearly identify changes in the natural language of a document's text and any text equivalents (e.g., captions). [Priority 1]”
WCAG 2.0 Reference
3.1.1 Language of Page “The default human language of each Web page can be programmatically determined. (Level A)”