0.9,th-th 【HD 2026】
When a web browser sends a request, it might include a header like: Accept-Language: en-US, th-TH;q=0.9
: Developers use these strings to match user OS settings with available translation files.
: The server looks for a version in US English ( q=1.0 by default). 0.9,th-TH
: If neither is found, the server provides its own default language. 3. Contextual Variance
: If English isn't available, it serves the Thai version because it has the next highest weight ( q=0.9 ). When a web browser sends a request, it
The server analyzes this list to determine which version of a page to serve:
Are you looking to or analyze its impact on SEO and localized content delivery ? : Used by clients to request specific data
: 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