Language Packs
The U.S. English files necessary to run your products is always installed with the products. However, for many products, you can also install language packs that provide translated user interfaces, messages, help, and documentation.
Most products support multiple languages at a time; you can install as many language packs as you need. For products that support multiple languages, your client setup (that is, browser language preference, default locale in which the product is started, and locale selected in your user profile) will determine which language you see. If you operate a product in a locale for which language packs are not available or installed, you will see U.S. English.
Language packs are available on all supported operating systems except Mac OS X.