HTML - language (lang|xml:lang) attribute

1 - About

The lang attribute can specified:

3 - Namespace

3.1 - No

In no namespace, the language attribute specifies the primary language for the element's contents and for any of the element's attributes that contain text.

Its value must be:

  • a valid BCP 47 language tag,
  • or the empty string (unknown primary language)

The lang attribute is a global attributes.

3.2 - Xml

The lang attribute is also defined in the XML namespace.

The lang attribute in the XML namespace xml:lang may be used:

  • on HTML elements in XML documents,
  • as well as elements in other namespaces if the relevant specifications allow it.

The following specifications allow lang attributes in the XML namespace to be specified on their elements).

4 - Documentation / Reference

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