html-lang-require
The lang attribute of an <html> element must be present and should be valid.
Level: Warning
Config value
Section titled “Config value”true: enable rulefalse: disable rule
The following pattern is not considered rule violations
Section titled “The following pattern is not considered rule violations”<html lang="en"></html>The following patterns are considered a rule violations
Section titled “The following patterns are considered a rule violations”<!-- missing lang tag --><html></html><!-- empty lang tag --><html lang=""></html><!-- invalid BCP 47 lang value --><html lang="-"></html>