For PC users, you may need to update your Windows Registry ( regedit ) to tell the game to launch in the new language by modifying the Locale string under the FIFA 17 entry. How to change the commentary language in EA SPORTS FC™
For a comprehensive solution, some repacks and community uploads offer what is called a "Multi-18" version. This includes files for up to 18 different languages. The most common version you’ll find is the FIFA.17.Multi.18.Super.Deluxe.Edition from 3DM. fifa 17 language pack download