Change language setting os = ubuntu 13.04

# vim /etc/default/locale

 //change to below param's if its like eg. LANG="np_NP"                                    
LANG="en_US.UTF-8"
LC_NUMERIC="en_US.UTF-8"
LC_ALL="en_US.UTF-8"
.
..
...

# sudo locale-gen

logout and login again