0.9,th-th -

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

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

: If neither is found, the server provides its own default language. 3. Contextual Variance : This identifies the language as Thai (

Are you looking to or analyze its impact on SEO and localized content delivery ? 0.9,th-TH

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