Change your keyboard language
You must set up more keyboard languages before you can switch between languages. If you set up 
multiple languages that use the same keyboard layout (Such as QWERTY, AZERTY, or QUERTZ), your 
BlackBerry device automatically detects words in each language.
1. At the beginning of a new line of text, tap .
2. Tap the language you want to type in on your BlackBerry Keyboard.
If you set up two languages that use different keyboard layouts, the language and default keyboard 
layout automatically switches to the other layout. If you set up three languages that use different 
keyboard layouts, your device automatically cycles to the next language in the list that has a different 
default keyboard layout. In both cases, your device recognizes words from all the keyboard languages 
you set up.