Use the language key to switch typing input languages
Before you begin:
You can use the following shortcut only on the touch screen keyboard of your BlackBerry smartphone.
You can use the language key to switch between the languages that you set in the Input Language field. You can use the
language key only if you have multiple languages set in the Input Language field.
On the home screen or in a folder, click the Options icon.
Click Typing and Language > Language.
Select the Virtual Keyboard Language Key checkbox.
To stop using the language key to switch languages, clear the Virtual Keyboard Language Key checkbox. The language key
is replaced by a key with the symbol most often used in your typing input language.