Postgresql installation failed if we provide non-english password(Chinese or French)
I'm not a Postgresql guy, but from this blog by Jasper Peilee:


  If you need Asian-language support, don’t leave(sp) the locale as “default”. Simply choose any other locales, e.g. “C” in the combo list.
  
  After the installation, supposing you need simplified Chinese support, change the configuration using command:
  
  Windows: initdb -D data –locale=chinese-simplified_china.936 -E UTF-8 
  Unix/Linux: –locale=zh_CN.UTF-8


Hopefully that points you in the proper direction.  If not, please update your question with some more information such as the error you receive, the installer you're using, the installer options, etc.