hey friend, well i have done what you said, and it didnt worked...
my back-end joomla is in english, and i put in "Extentions>Language menager>Installed-site" to hebrew default.
and after all that its still in english... maybe i missed something.
so i fixed it abit diffrently, i changed the content in file en-GB..
and it worked

kinda... still it shows me the date in english like "Wednesday, 25 June 2014" any idea how to fix it ??
or why he-IL.com_vitabook.ini didnt worked ??
thanks alot for the help
looking to hear forward from you
CS