0.9,fr-fr

Are you trying to or set up language detection for a specific web application? The role of Accept-Language header in software localization

The string "0.9,fr-FR" is typically a segment of an , which tells a web server which languages a user prefers for the content they receive. Understanding the Syntax 0.9,fr-FR

: Developers use these strings in languages like Python (Flask) or Node.js to automatically redirect users to the correct localized version of a site. Common Example Are you trying to or set up language

: The "q" (quality value) is a weight from 0.0 to 1.0. A value of 0.9 indicates a high priority, though typically slightly lower than the primary language (which defaults to 1.0 if not specified). How Servers Use It Common Example : The "q" (quality value) is

In this context, the values indicate a prioritized list of preferences: : This specifies French as spoken in France .

: If the server has a French (France) version of the page, it will serve that.