Implementing hreflang Tags for a Multi-Language Video Site

If you run a site that serves content in multiple languages or regions, hreflang tags are essential for SEO. Here's how I implemented them on TopVideoHub , a video platform covering 9 Asia-Pacific regions. What Are hreflang Tags? hreflang tags tell search engines which version of a page to show to users in different countries or languages. Without them, Google might show your Japanese content to English searchers, or treat your regional variants as duplicate content. The Challenge TopVideoHub has regional variants for every page: / — English (default) /?region=JP — Japanese trending /?region=KR — Korean trending /?region=TW — Traditional Chinese (Taiwan) /?region=HK — Traditional Chinese (Hong Kong) /?region=VN — Vietnamese trending /?region=TH — Thai trending Each page needs hreflang tags pointing to all other variants, and the references must be bidirectional. Implementation I built a PHP helper that generates hreflang tags for any page: <?php declare ( strict_types = 1 ); enum Hrefl