hreflang values valid

SEOWeight 1.0%Score 100

What this is

For sites with several language versions, whether the tags that link those versions to each other (hreflang) use valid language codes.

Why it matters

When they're valid, Google shows each visitor the version in their language, such as the Traditional Chinese page to users in Taiwan. Invalid codes are simply ignored.

What counts as passing

Passes when every code is in standard form (e.g. zh-TW, en-US, or x-default); fails if any one is invalid; not scored when the page has no language-version tags.

Evidence

Language-version tags found

Link https://sag3o.com/zh-TW
hreflang zh-TW
Link https://sag3o.com/en-US
hreflang en-US
Link https://sag3o.com
hreflang x-default

Invalid language codes

None found

Invalid language codes

None found

Raw data

Check ID seo.hreflang.valid

{
  "tags": [
    {
      "href": "https://sag3o.com/zh-TW",
      "hreflang": "zh-TW"
    },
    {
      "href": "https://sag3o.com/en-US",
      "hreflang": "en-US"
    },
    {
      "href": "https://sag3o.com",
      "hreflang": "x-default"
    }
  ],
  "invalid": [],
  "invalidList": ""
}

Suggestion

Pro plan only

Fix invalid hreflang values

The following hreflang values are not valid BCP 47 codes: .