You will use the Dialog's Translation Table editor to translate the dialogs of your setup project. It is a very easy and useful editor, that will increase the task of translating each string contained in the dialog.

 

To translate a setup dialog, go to Setup Dialogs' toolbox (View > Setup Dialogs menu command). Right-click the dialog you want to translate and then select Dialog's Translation Table. The dialog's translation table editor will be displayed with all translatable strings of the selected setup dialog. Now, just translate the strings of the language that you want.