Open Settings: Locate and tap on the "Settings" app on your iOS device's home screen. It's usually represented by a gear icon.

Scroll to General: In the Settings menu, scroll down and tap on "General."

Select Language & Region: Within the General menu, find and tap on "Language & Region."

Choose Preferred Language: Tap on "iPhone Language" (or "iPad Language") at the top. You'll see a list of available languages.

Select New Language: Choose the language you want to set as the default. You may see a prompt asking if you want to change the language; confirm your choice.

Restart Your Device: After selecting the new language, your device might prompt you to restart it. If not, it's a good idea to restart it manually to apply the language change.

Open Settings: Open the "Settings" app from the app drawer or by pulling down the notification shade and tapping the gear icon.

Navigate to System: Scroll down and find the "System" option. Tap on it.

Select Languages & input (or Language & Region): Depending on your device and Android version, the wording might differ. Look for "Languages & input" or "Language & Region" and tap on it.

Add a Language: Tap on "Languages" (or a similar option) to view the list of languages.

Add or Change Language: If your desired language is already in the list, simply tap on it to select it as the default. If not, tap on "Add a language" and choose the language you want.

Reorder Languages (Optional): Some Android devices allow you to reorder your preferred languages. This determines the priority of languages for various apps and features.

Set as Default: After selecting the language, you might be prompted to set it as the default language. Confirm your choice if prompted.

Restart Your Device: To apply the language change across the entire system, it's a good idea to restart your device.