# International SEO & Hreflang — SEO for Developers Source: https://www.geekswithgeeks.com/en/seo-developers/seo-international-seo > Serve the right language and region to users and search engines. ## Multi-language site structure Two common approaches: **subdirectory** (`example.com/en/`, `example.com/fr/`) or **subdomain** (`en.example.com`, `fr.example.com`). Subdirectories consolidate link authority; subdomains keep language versions separate. ## Hreflang markup Use hreflang tags to tell Google the relationship between language versions. Include an `x-default` version for users whose language doesn't match. ```html ```