Use xml:lang as profiling attribute
You can use the xml:lang element as a profiling (filtering) attribute in your XML output.
Select Layout in the top menu.

Paligo displays a list of Layouts. The list is empty if there are no custom Layouts in your Paligo instance.
Select the XML Layout that you are going to use for publishing.
Select Classes and attributes in the sidebar.
Set Use xml:lang as profiling attribute to:
Default - The default for this setting is No.
Yes - To use xml:lang as a profiling attribute.
No - To disable xml:lang as a profiling attribute.
Select Save.
For more information on using xml:lang as profiling attribute, please see Filter by language.