Office.com is one of the largest multilingual content driven web-sites in the world. With more than 1 billion visits per year, it reaches 40 languages. For the Office 2010 release, authoring and publishing for Office.com was changed to make use of Microsoft Word and SharePoint. A large migration effort was undertaken to move 5 million+ assets for 40 markets to new file formats and management systems. In this talk we will present lessons learnt for designing and managing multilingual web-sites from this major re-engineering exercise.