0.9,th-th 【2025】

The string breaks down into two distinct parts defined by the HTTP/1.1 specification :

: Developers use these strings to match user OS settings with available translation files. 0.9,th-TH

: The server looks for a version in US English ( q=1.0 by default). The string breaks down into two distinct parts

: This identifies the language as Thai ( th ) and the region as ( TH ). 0.9,th-TH

When a web browser sends a request, it might include a header like: Accept-Language: en-US, th-TH;q=0.9