Invalid Hreflang Codes Test Page

This page has invalid hreflang language or region codes.

What's wrong?

• en-UK - Invalid region code. Should be en-GB (UK is not a valid ISO 3166-1 Alpha-2 code)
• eu - Invalid language code. "EU" is not a valid ISO 639-1 language code
• US-en - Wrong format. Should be en-US (language-region, not region-language)

Expected Detection:

Check: hreflang (automatic)

Status: Fail

Severity: Warning

Issue Type: hreflang_invalid

How to Fix:

Use valid language and region codes:

• Language codes: Must be valid ISO 639-1 (2 lowercase letters: en, fr, es, de, etc.)
• Region codes: Must be valid ISO 3166-1 Alpha-2 (2 uppercase letters: US, GB, FR, DE, etc.)
• Format: Always language-region (e.g., en-US, fr-FR, de-DE)

Common Mistakes:

❌ Wrong:
  en-UK  → Should be: en-GB
  en-uk  → Should be: en-GB (region must be uppercase)
  EU     → Not a valid language code
  US-en  → Should be: en-US (language first)
  eng    → Should be: en (ISO 639-1 is 2 letters)

✅ Correct:
  en     → English
  en-US  → English (United States)
  en-GB  → English (United Kingdom)
  fr-FR  → French (France)
  es-MX  → Spanish (Mexico)

Current (Invalid) Metadata:

alternates: {
  canonical: "https://mock.okok.now/issues/hreflang-invalid",
  languages: {
    en: "https://mock.okok.now/issues/hreflang-invalid",
    "en-UK": "...",  // ❌ Invalid
    "eu": "...",     // ❌ Invalid
    "US-en": "...",  // ❌ Invalid
  }
}