Installing service packs, cumulative updates, and language packs for SharePoint each require running the SharePoint Products Configuration Wizard to configure SharePoint to use the newly installed software. In this recipe, we will run the wizard to complete the installation of our language packs.
Follow these steps to run the SharePoint Products Configuration Wizard:
Select the SharePoint 2013 Products Configuration Wizard from the Microsoft SharePoint 2013 Products folder in the Start menu.
Complete the wizard with the default options to configure the language pack on the local SharePoint server. The SharePoint Products Configuration Wizard must be run on each SharePoint server, one at a time. Since the wizard makes changes to the SharePoint configuration database, running the wizard on multiple servers at the same time is not supported.