Attribute: xml:lang
Value: NMTOKEN
May be in elements:
- <abbrev-journal-title>
- <alt-text>
- <array>
- <article-title>
- <boxed-text>
- <caption>
- <disp-quote>
- <fig>
- <fn>
- <inline-formula>
- <journal-subtitle>
- <journal-title>
- <kwd-group>
- <long-desc>
- <p>
- <preformat>
- <sec>
- <source>
- <speech>
- <subtitle>
- <supplementary-material>
- <table-wrap>
- <trans-source>
- <trans-title>
- <trans-title-group>
- <verse-group>