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
A full header might look like this: Accept-Language: en-US,en;q=0.9,fr-FR;q=0.8 This tells the server: "I prefer US English (1.0), but I'll take any English (0.9) or French from France (0.8) if that's what you have". 0.9,fr-FR
When a server receives this header, it attempts to match the request with available content: The string "0
Are you trying to or set up language detection for a specific web application? The role of Accept-Language header in software localization The role of Accept-Language header in software localization
: If fr-FR is not available, it may look for a general French version ( fr ) or the next language in the user's priority list.
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