XTM is one of CAT systems. This CAT tool is web-based and requires Internet connection. The format is similar with SDLX, but the its features are limited. Since it's a web-based tool, I do not like this system. Its spelling check feature for Korean is also not so satisfactory. I normally perform spelling check after translation. For this, the preview feature of XTM is useful. To preview translated documents, just click the preview menu icon. When a pop-up window appear, you can choose from several options.