Locale problem

[Santiago Erquicia]

I just installed Skype and when I try to start it, it does but all the
strings appear in Chinese or some other language like that.

If I run locale as my user this is what appears:
LANG=POSIX
LC_CTYPE="POSIX"
LC_NUMERIC="POSIX"
LC_TIME="POSIX"
LC_COLLATE="POSIX"
LC_MONETARY="POSIX"
LC_MESSAGES="POSIX"
LC_PAPER="POSIX"
LC_NAME="POSIX"
LC_ADDRESS="POSIX"
LC_TELEPHONE="POSIX"
LC_MEASUREMENT="POSIX"
LC_IDENTIFICATION="POSIX"
LC_ALL=

Is that right?  How can I change this?

Thanks,
Santiago