{
	"id": "valid-lang",
	"evaluate": "valid-lang-evaluate",
	"options": {
		"attributes": ["lang", "xml:lang"]
	},
	"metadata": {
		"impact": "serious",
		"messages": {
			"pass": "Value of lang attribute is included in the list of valid languages",
			"fail": "Value of lang attribute not included in the list of valid languages"
		}
	}
}