~/.pam_environment

1. Open "~/.pam_environment",
   

   LANGUAGE=ja_JP:zh_CN:en
   LANG=ja_JP.UTF-8
   LC_NUMERIC=ja_JP.UTF-8
   LC_TIME=ja_JP.UTF-8
   LC_MONETARY=ja_JP.UTF-8
   LC_PAPER=ja_JP.UTF-8
   LC_NAME=ja_JP.UTF-8
   LC_ADDRESS=ja_JP.UTF-8
   LC_TELEPHONE=ja_JP.UTF-8
   LC_MEASUREMENT=ja_JP.UTF-8
   LC_IDENTIFICATION=ja_JP.UTF-8

2. wtf? "zh_CN"?
3. I edited "LANGUAGE" line to,
   

   LANGUAGE=ja_JP:en