Open your settings app>system>about or control panel>system, to find out what edition your laptop is running. Then just download the corresponding version. If you're running Windows 10 pro, you are allowed to change language by downloading language packs. I believe you can't do so on home/single language editions, which you must download the installer/iso in the language you want and reinstall.

This post has been edited by thewan: Oct 9 2016, 02:11 AM