Ok, i try to contact him. What about installing the new language, i know at thousands have been asking it, but i wanna ask it too Shall i just put new files in our website ftp-server and overwrite all or what...?
Well there is the e107_languages folder. Simply follow its lead Copy the folder, rename it to your language, and start editing the files. Same goes for plugins, most plugins have got a folder with languages in it.
Coordinate with nlstart to avoid unnecessary work.