The typing input method that you use determines how you type. For example, if you're using the predictive input method, your BlackBerry smartphone displays a list of suggested words as you type so that you don't have to type the entire word.
The language that you're typing in determines the typing input methods that are available. If you're typing in a language that has multiple typing input methods, you can switch between typing input methods when you're typing. When you're typing in certain fields such as password fields, your smartphone might automatically switch your typing input method.