<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head><title>Hyphenation test</title></head> <!-- check that xml:lang beats lang --> <!-- check that hyphenation is not applied to unknown language --> <body lang="en-us" xml:lang="x-unknown-language"> <div style="width: 5em; hyphens: auto;"> supercalifragilisticexpialidocious </div> </body> </html>