Ehm,
sorry maybe I've explained not very well my question. The question is if I can change the translation of the GXT components on the fly. So if I change my locale GXT is reading new MyMessage.properties file with the correct locale selected or the locale is a static choose to make on compilation time?
not sure, but would be interested in what you find out.... obviously this approach is not common and most would load a page based on browser locale settings etc... ie what is normally done in GWT and I believe GXT follows that approach by using the GWT objects/methods to determine the correct i18n info