A number of new and practical features have been added to the renewed interface, such as the ability to build web sites in different languages and better support for CSS. Microsoft Expression Web Review Microsoft Expression Web aims to quickly replace Frontpage, which until now has been the U.S. Microsoft Expression Encoder 4 with Service Pack 1 (SP1) Expression Encoder 4 with SP1 is an advanced audio/video-encoding and live-broadcasting application that includes Service Pack 1, which provides new feature support, updates, and stability enhancements.