Ana Guerrero and me have done one discovery. If i run Kpersonalizer, initially show English language and United Kindom, but d3lphin and kcheckgmail are in Spanish, if i continue with the assistant and finish it, after that, d3lphin and kcheckgmail are translated into English. I think that language should be completely changed from Kcontrol without need of run again Kpersonalizer, because this make all decorative personalisation of KDE to disappear.