Creo Direct > References > Language Support > Setting the Language Environment Variable > LANG and PRO_LANG Environment Variables
  
LANG and PRO_LANG Environment Variables
LANG is a standard environment variable that controls the locale of the session for the Creo application. The following variable values also apply to the PRO_LANG variable for the languages listed in the table below.
Language of Microsoft Windows Operating System
PRO_LANG Variable Values
Chinese Simplified
chinese-simplified
chs
Chinese Traditional
chinese-traditional
cht
Brazilian Portuguese
portuguese
English
c
english
French
french
German
german
Italian
italian
Japanese
japanese
Korean
korean
Russian
russian
Spanish
spanish