Add new translation (turkish-tr) in ZCS

[ersinttnet]

Hi,
I want to adding turkish translation in ZCS.
1- I running command :
%cp *Msg_tr.properties /opt/zimbra/jetty/webapps/zimbra/WEB-INF/classes/messages
%cp *Msg_tr.properties /opt/zimbra/jetty/webapps/zimbraAdmin/WEB-INF/classes/messages
%cp *KEYS_tr.properties /opt/zimbra/jetty/webapps/zimbra/WEB-INF/classes/keys
%cp *KEYS_tr.properties /opt/zimbra/jetty/webapps/zimbraAdmin/WEB-INF/classes/keys
%cp ZsMsg_tr.properties /opt/zimbra/conf/msgs

2- restart zimbra
% su /etc/init.d/zimbra stop
% su /etc/init.d/zimbra start

3- cleaned my browser cache

but turkish language not display in language list at preferences.
What I must do about this.
please help me.