{ "id": "html-lang-valid", "selector": "html[lang], html[xml\\:lang]", "tags": ["cat.language", "wcag2a", "wcag311", "ACT"], "metadata": { "description": "Ensures the lang attribute of the element has a valid value", "help": " element must have a valid value for the lang attribute" }, "all": [], "any": [], "none": ["valid-lang"] }