Magento - Create Custom Field in Order Form

Hello, we are a men's clothing retailer which operates using an online Magento sales platform. Our in-house designer has created a customer order form for us, but can't get it to display characters in Chinese, which form an essential part of the document. We need somebody to ensure that information entered into a product field in Chinese can be transferred to the order form and emailed to our supplier. Cheers, Jonathan