[xwiki-users] bug and questions on xwiki farm

Hi all Xwiki Team Since Vincent has re-installed my xwiki on farm, I'm learning to use Xwiki and want to ask you about some problems I have. The Chat Application installed with Extension Manager doesn't work, and I can't uninstall it, How to do ? http://extensions.xwiki.org/xwiki/bin/view/Extension/ChatApplication#Comment... Multilingual option doesn't work very well, Supported languages : "fr en" Default Language : "fr"Sometimes I can choose the language on the top-right, but sometimes not and don't know why. Kévin