Create hreflang link tags for international SEO so Google serves the right language/region version of your pages.
No trailing slash
Include leading slash
<link rel="alternate" hreflang="x-default" href="https://example.com/about">
<link rel="alternate" hreflang="en" href="https://example.com/about">
<link rel="alternate" hreflang="es" href="https://example.com/es/about">
<link rel="alternate" hreflang="fr" href="https://example.com/fr/about">Place these <link> tags in the <head> of every language variant — each page must reference every other variant, including itself.