Xiaomi
Change System Language auf Xiaomi
The language you picked during the first setup of your Xiaomi phone is not permanent. MIUI stores it as a regular system setting, so you can change it anytime without resetting the device or losing data.
This matters if you bought the phone in a different region, borrowed it from someone else, or accidentally tapped the wrong language during activation. It also matters if you want the interface in one language but your keyboard or a specific app in another, since the system language only controls menus, notifications, and default apps.
Where to find the language setting
Go to Settings ➔ Additional settings ➔ Languages & input ➔ Languages. From the list, tap the language you want to use, then confirm with OK. The interface switches immediately, no restart needed.
If the list does not show your language, check whether it needs to be added first from the same Languages screen. Third-party apps with their own language setting, such as messengers or browsers, are not affected by this change and need to be adjusted separately inside the app.