Oracle Database Express Edition (XE)

hi, all
can anybody tell what is going on with m XE, It was no set up to start upon system reboot, so I need to to < lsnrctl start> and <startup> being as oracle user. But this time it does't work.
I have this message upon calling sqlplus: sp1<lang>.msb not found
is it lang like English/French/Russian ? I played with installing language pack on this machine but like another user.

Thanks all
T

-bash-4.1$ which sqlplus
~/app/oracle/product/10.2.0/server/bin/sqlplus
-bash-4.1$ ~/app/oracle/product/10.2.0/server/bin/sqlplus
Error 6 initializing SQL*Plus
Message file sp1<lang>.msb not found
SP2-0750: You may need to set ORACLE_HOME to your Oracle software directory
-bash-4.1$ echo $ORACLE_HOME
/usr/lib/oracle/xe/app/oracle/product/10.2.0/server
-bash-4.1$ echo $PATH
/usr/lib/oracle/xe/app/oracle/product/10.2.0/server/bin:/usr/lib/oracle/xe/app/oracle/product/10.2.0/server:/usr/local/bin:/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/sbin
-bash-4.1$ which oracle
~/app/oracle/product/10.2.0/server/bin/oracle
-bash-4.1$