Identify the default language of a document by providing a lang attribute with correct value.
Engine scans for an empty or invalid lang attribute on the document (HTML element)
The objective of this technique is to identify the default language of a document by providing the lang and/or xml:lang attribute on the html element.
Identifying the language of the document is important for a number of reasons:
It allows braille translation software to adapt accordingly.
Speech synthesizers that support multiple languages will be able to speak the text in the appropriate accent with proper pronunciation.