Exactly which MAGIX product and version/generation is this about? This would be important to answer the question accurately. In older MAGIX products, you will be given a choice during the disc or download installation process, which is sometimes missed, and would thus require a reinstallation. In more current MAGIX product generations, the download manager for the installer tries to default to the operating system language. If you're trying to install a program language different from your OS, or if the installer defaults to the wrong language for whatever reason, there's a procedure to manually force the desired language. So, please confirm if the latter applies to you, or get in touch with MAGIX support to receive detailed instructions on how to do that.