The File System Safe Universal Transformation Format, or UTF-8, is an encoding that is defined by X/Open® as a multibyte representation of Unicode. UTF-8 encompasses almost all of the characters for traditional single-byte and multibyte locales for European and Asian languages for Solaris locales.
th_TH.UTF-8 locale is the Unicode locale for Thailand.
hi_IN.UTF-8 locale is the Unicode locale for India.
zh_HK.UTF-8 locale is the Unicode locale for Hong Kong, China.