Language Macro

I clearly understand that using the below macro one can change the language. however, where does one find the list of Language parameters.
Ex. 1: Changing the language to English and regional settings to Canada.
sc_set_language(‘en_us;en_ca’);

Thus, us=English, ca=Canada, en=English

But how do we find the list of all abbreviations of the various language and regionals

hi Larryh

that is standard

have a look into _lib/lang