mdk 10.0 local problem,cant find some directories

[root@123 public_html]# locale
locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_MESSAGES to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory
LANG=zh_TW.UTF-8
LC_CTYPE=zh_TW.UTF-8
LC_NUMERIC=zh_TW.UTF-8
LC_TIME=zh_TW.UTF-8
LC_COLLATE=zh_TW.UTF-8
LC_MONETARY=zh_TW.UTF-8
LC_MESSAGES=zh_TW.UTF-8
LC_PAPER=zh_TW.UTF-8
LC_NAME=zh_TW.UTF-8
LC_ADDRESS=zh_TW.UTF-8
LC_TELEPHONE=zh_TW.UTF-8
LC_MEASUREMENT=zh_TW.UTF-8
LC_IDENTIFICATION=zh_TW.UTF-8
LC_ALL=

how can i solve it....?

[root@123 public_html]# urpmi -e tree
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = "C",
LC_ALL = (unset),
LC_PAPER = "zh_TW.UTF-8",
LC_ADDRESS = "zh_TW.UTF-8",
LC_MONETARY = "zh_TW.UTF-8",
LC_NUMERIC = "zh_TW.UTF-8",
LC_TELEPHONE = "zh_TW.UTF-8",
LC_MESSAGES = "zh_TW.UTF-8",
LC_COLLATE = "zh_TW.UTF-8",
LC_IDENTIFICATION = "zh_TW.UTF-8",
LC_MEASUREMENT = "zh_TW.UTF-8",
LC_CTYPE = "zh_TW.UTF-8",
LC_TIME = "zh_TW.UTF-8",
LC_NAME = "zh_TW.UTF-8",
LANG = "zh_TW.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").