: If neither is found, the server provides its own default language. 3. Contextual Variance
: This identifies the language as Thai ( th ) and the region as ( TH ). 0.9,th-TH
: 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 : If neither is found, the server provides
When a web browser sends a request, it might include a header like: Accept-Language: en-US, th-TH;q=0.9 : If neither is found
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