Dynamic Localization & SmartGWT

Dear Support,

We have localized our application using the Dynamic String Internationalization technique (without the need to compile permutations for each locale), as documented by Google:

http://www.gwtproject.org/doc/latest/DevGuideI18n.html#DevGuideDynamicStringInternationalization

Everything runs perfectly on our side but the SmartGWT strings remain in English, even if we add "&locale=fr" (e.g.) in the URL. Can you please advise us how we can switch/force the client locale in this case?

Many thanks,

Thomas