How do I change the writing language in messages?

When writing, you can switch between several writing languages. Before you use a writing language for the first time, you have to add it from the on-screen keyboard or the Phonepad.

To add a writing language for text input

1. When you enter text using the on-screen keyboard or Phonepad, tap the Number and Symbol icon or the Number icon.
2. Tap the Settings icon, then tap Keyboard settings.
3. Tap Languages > Writing languages and mark the relevant checkboxes. Press the Back key to confirm.