Hello Kyuni,
Thank you for using Apple Support Communities.
For more information, take a look at:
iOS: Using international keyboards
http://support.apple.com/kb/HT4509
If more than one keyboard is on, you can change the language while typing with two methods:
- Tap the Next Keyboard key to choose the next language. The chosen language shows on the Space bar.
- Touch and hold to display a menu of the enabled keyboards.
- Drag to choose a new keyboard.
iOS: Back up and restore your iOS device with iCloud or iTunes
http://support.apple.com/kb/ht1766
If you have a new iOS device, or if you need to restore your iOS device to resolve an issue, follow these steps.
You can use iTunes to back up and restore your content on your iPhone, iPad, or iPod touch.
If you can't update or restore your iOS device
http://support.apple.com/kb/ht1808
Have a nice day,
Mario