A. Manually add Hreflang tags to the header of your website. You can do this by editing the HTML of your site. Ensure that you specify the correct language and regional targeting for each page. For example, use <link rel='alternate' href='URL' hreflang='de-DE' /> for German pages.
B. If manual editing is not feasible, consider using a third-party SEO tool that can help manage Hreflang tags. Some SEO plugins can automatically generate these tags based on your site structure.