When writing an application you should consider localizing it. Especially when planning to roll it out in different coutries. The Blackberry OS supports this as a built in feature. You just have to use it. When localizing my first application it gave me a hard time since the Java IDE does some dark magic that I did not expect. Therefore I want to describe what I did and how it works.
At the end of the guide you will also get the chance to download the demo projects. This may give you the ability to play around a bit.