0.9,de-de Apr 2026

The request refers to setting a language preference within a browser's Accept-Language header.

: It allows users to browse in their native or preferred language automatically. 0.9,de-DE

: By setting a high weight like 0.9, you ensure the site knows exactly which language to prioritize if multiple options are available. The request refers to setting a language preference

: A typical optimized header for a German speaker who also knows English might look like: en-US,en;q=0.9,de-DE;q=0.8 . : A typical optimized header for a German

You can manually configure this preference in your browser or through the Windows Registry to ensure websites default to German while still allowing fallback languages:

The value de-DE;q=0.9 tells a website that is your preferred language, with a "quality value" (q) of 0.9. This value ranges from 0 to 1, where higher numbers indicate a stronger preference. How to use this feature

: If you are a developer using frameworks like Next.js, you can configure i18n locales to automatically detect these headers and serve the correct language version of your site to the user. Why this is a "Good Feature"