Bonjour Olivier, apart from the importing issues David mentioned (which do not occur regularly and thus are somewhat unpredictable), you will not be able to run your version of AE in a different language than the operating system. When you select e.g. English on a French system, you will end up with a mishmash of languages that's confusing (for instance Expression controls will use French names, but function as if they were Englisch). If it's of any relevance - AE7 will not be able to detect OpenGL in most cases - either the driver is being protected by the system so AE can't probe it properly or it will return different values and version info than the one AE expects. I can only chime in with David and recommend to upgrade to CS3.