0.9,th-th -

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

While primarily used in HTTP, this syntax appears in other technical environments: 0.9,th-TH

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 : If English isn't available, it serves the

: Often written as q=0.9 , this is a Relative Quality Factor . It ranks user preferences on a scale from 0.0 to 1.0. A value of 0.9 indicates it is a secondary preference if a primary language (defaulting to q=1.0 ) is unavailable. 2. Practical Application: How Servers Use It : If English isn't available