SOLVED Thanks Superman. Credits to him.The key is NOT DEPENDING FROM SYNAPICS INSTALLER.1.- First identifie your LibreOffice build. Knoppix 7.4.2 is 4.3.2.2, for Debian Wheezy / Stable (Keep this in mind)2.- Download your LibreOffice Language pack of your choice from this page https://packages.debian.org/wheezy/localization/ (This is Debian's package source for every Debian-based build like Knoppix)3.- After you download it , right click on the .debs package and open it with GDebi Package Installer4.- GDebi will recognize the package showing "all dependencies are satisfactory"5.- Press install button6.- Once installed, close, and enjoy LibreOffice in your language.Note: This is not for installing a dictionary for correction. This is to change the GUI's language. Thanks to everyone and use Linux.