If you're marketing to international customers it is a false economy to not translate your website. A customer is far more likely to interact with any buy from you site if it is written in their own language. Don't fall into the trap of using Google to translate either - whilst that's good for the odd work or phrase, translating a whole site using machine translation alone will end up with embarrassing or comical results. Speak to a professional translation provider to understand how translation technology can be used for cost-effective translation solutions but paired with human translators to ensure quality and relevance.