Accept-Language Header Parser

Parse an Accept-Language request header into sorted language preferences, q values and fallback notes.

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This parser is for locale debugging when a browser, crawler or API client sends an `Accept-Language` header and the chosen language looks wrong.

What it reports

The tool splits language tags, reads `q` weights, sorts preferences, marks wildcards and shows the likely first-choice language plus region subtags.

Scope

The parser explains the header order. It does not know your application’s routing, supported locale list or translation fallback code.