xml:lang 

Identifies the language of the element's content. The values for this
attribute are language 'tags' as defined in BCP 47. All language tags that make use of
private use sub-tags must be documented in a corresponding language element in the MEI
header whose id attribute is the same as the language tag's value.

Attribute Information

Used By

Attribute Group xml:lang1

Source 

<xs:attribute name="lang" use="optional" form="qualified" type="xs:language">
  <xs:annotation>
    <xs:documentation>Identifies the language of the element's content. The values for this attribute are language 'tags' as defined in BCP 47. All language tags that make use of private use sub-tags must be documented in a corresponding language element in the MEI header whose id attribute is the same as the language tag's value.</xs:documentation>
  </xs:annotation>
</xs:attribute>

Sample