hreflang.missing-x-default
The hreflang set has no x-default entry.
What to change
Add <link rel="alternate" hreflang="x-default" href="..."> pointing at the language-selector or default version.
The documentation on developers.google.comA finding of this rule on a page carries the exact edits for that page: the markup it quotes, and what to write instead.
When it runs
Runs on every SEO audit: of a page, a crawl, a build directory or HTML. Info is a best practice: worth doing, rarely urgent, and --no-info leaves it out. Each finding takes 1 point off the page's score.
The severity here is the rule's usual one: a finding can be raised or lowered when the page gives a reason.
Run it, or skip it
Check a page for this rule alone, after a fix for instance:
npx @rivi-software/agentic-seo-check audit https://example.com --rule hreflang.missing-x-defaultOr from an assistant, with the MCP tool seo_audit_page:
{
"url": "https://example.com",
"rules": [
"hreflang.missing-x-default"
]
}To leave it out of an audit, pass --disable hreflang.missing-x-default on the command, or disableRules: ["hreflang.missing-x-default"] to a tool.
More in hreflang and languages
All 6 rules- Warning
hreflang.invalid-codehreflang values that are not valid ISO 639-1 language codes with an optional ISO 3166-1 region (or x-default). - Warning
hreflang.relative-urlhreflang links must use absolute URLs. - Warning
hreflang.duplicate-langThe same hreflang value appears more than once with different URLs. - Warning
hreflang.missing-selfThe hreflang set does not include this page itself (self-referencing entry). - Warning
hreflang.canonical-other-languageThe canonical points to an hreflang alternate in another language, so search engines treat this page as a copy of that one and leave it out of the index.