I don't know how that module module works, but DSLocalizator change the language for DNN the same way the normal routines. DSLocalizator must work with most multilanguage modules.
I talk very often with Erik as new core team members, but we keep business at our own side... hehe, and we are part of the localization team too, but we are only members of that team and I think this will take some time to start new thing about localization.
I hear from sebastian that Erik's modules work without problem under DSlocalizator
Hope it helps