0.9,th-th Instant

: Developers use these strings to match user OS settings with available translation files.

While primarily used in HTTP, this syntax appears in other technical environments:

: The server looks for a version in US English ( q=1.0 by default). 0.9,th-TH

: If English isn't available, it serves the Thai version because it has the next highest weight ( q=0.9 ).

: This identifies the language as Thai ( th ) and the region as ( TH ). : Developers use these strings to match user

This string is a specific component used in , specifically within the Accept-Language header. It communicates a user's preference for Thai (Thailand) with a weighted "quality" (q-factor) of 0.9 . 1. Technical Decomposition

: Used by clients to request specific data formats or localized error messages from RESTful APIs. Summary Table: Component Meanings th Language Code ISO 639-1 code for Thai TH Region Code ISO 3166-1 alpha-2 code for Thailand 0.9 90% weight ; high priority but not the absolute first choice : This identifies the language as Thai (

Are you looking to or analyze its impact on SEO and localized content delivery ?