When you change the languages on Galaxy S7 (Edge), everything will be shown in the newer language; from settings to apps. To change languages on Galaxy S7 (Edge), do as follows:
1. Open the Settings app by simply pulling down to status bar and hitting the Gear icon on the top right.
2. Scroll down to the Personal settings and touch to open the Language and Input settings. (If you have difficulty reading the settings' names, look for the light orange icons, and touch the second icon from the bottom)
3. Tap the Language option (It's the first item in the list)
4. Now select your preferred language, from available options such as English, Spanish, Chinese, Japanese, and German.