what is the replacement for xml:lang in CR version?

I have a schema that conforms to WD version and it has references to
xml:lang.
what is the equivalent in CR?

here is the snippet:
 <element name = "FreeFormText">
  <complexType content = "textOnly">
   <attribute name = "xml:lang" type = "string"/>
  </complexType>
 </element>

komal.