What you can do to write hreflang code?

Both options are correct ways to implement hreflang. Using a hreflang builder is a practical approach, especially for complex sites with many language and region variations, as it helps generate accurate code and reduces the risk of errors. Manually writing the hreflang code is also a valid method, particularly for smaller sites or when you have a deep understanding of the syntax and requirements. While more prone to human error, it offers complete control over the implementation. The key is to ensure the code is correctly formatted and implemented in the HTML, HTTP header, or sitemap.