{ "id": "has-lang", "evaluate": "has-lang-evaluate", "options": { "attributes": ["lang", "xml:lang"] }, "metadata": { "impact": "serious", "messages": { "pass": "The element has a lang attribute", "fail": { "noXHTML": "The xml:lang attribute is not valid on HTML pages, use the lang attribute.", "noLang": "The element does not have a lang attribute" } } } }