Translate orijinal messages on server

Hi guys i have downloaded craftbukkit recently and my plan is opening a skyblock server.I try to run my server and i have succeed about it but i have other problem now. I want to set up my server for other county in this case i want to change the orijinal messages of craftbukkit. I dont have any plugin in my server yet just craftbukkit and i want to change the orijinal messages for example when you type /pl its say you dont have a permisssion to use this or something like this.Can you help about translate all the text on orijinal craftbukkit.I am sorry about the language English is not my fist language.Thanks for your help already.