To change the language settings on your tablet, in the settings app, you tap on “Language & input” at the bottom.
Here you can change your tablets language settings and the keyboard settings.
To change the language on your device, tap on “Language” at the top.
You can now choose a language from the list.
Once you have chosen your language, tap on it, and then tap on „OK“ in the popup.
And now everything should be in your chosen language.