The applications for mobile phones share similar issues of web sites, one of them is the language support. Accordingly to user's preferences or where the user is, the language of the application should change. Actually, it is not only a problem only of language, but also images, sometimes colors and style too. In this article there are the guide lines to create an international application that can run for every client, all over the world.

 Android is getting popularity, also considering the launch of Google Nexsus One (but do not forget that Android is used by other devices like Nokia and HTC), and therefore programming for Android is the way to personalize the mobile phone. The concepts behind programming are often the same except for the typical characteristics of the device.

 The first program to understand a new language or a new platform is the well known “Hello World!”. In this article there are the guide lines to write the first program for Android.