When installing Smart Connection in a version of InDesign or InCopy that is in any of the available languages, most of the information displayed by Smart Connection is automatically displayed in that language. Changing the language therefore involves using a version of InDesign or InCopy in the required language and installing Smart Connection in that version.
Note that some parts of Smart Connection get their data from Enterprise Server. To make sure that these parts are also in the required language, make sure that the correct language is set in your user profile in Enterprise Server. To verify this, contact your system administrator.