Download a movie hash program, such as Mozilla's Subtitle Matcher or go the online movie hash database at Subtitles.com. Follow the instructions given specific to the download and dependent on whether you have a Mac or PC. Also, try the websites rapidsubs.com or subtitleseeker.com.
Name a specific movie in the program's search field and click enter. You may skip this step to search for any movies with a specific subtitle language.
Select the language of the subtitles desired. The languages are usually identified by the relevant country flag. Note that English will be identified by the British flag and not the American.
Download the subtitles. Some programs, such as iGoogle Gadget, will give you the option to watch the movie online with the selected subtitles. Additional downloads may be required.