To change language (English, Czech, Danish, German, Spanish, SpanishInternational, Finnish, French, Hungarian, Italian, Japanese, Korean, Norwegian, Dutch, Polish, PortugueseBR, Romanian, Russian, Swedish, Turkish, Ukrainian, SimpChinese, TradChinese) edit PhotoshopCS6Portable.ini with Language="one of the name of subfolders in App\PhotoshopCS6\Locales" (or menu Edit/Preferences/General.../Interface/UI Language).
You can add plug-ins in App\PhotoshopCS6\Plug-ins

Extract and run PhotoshopC6Portable. Settings created in Data.
Don't run at the same time of another Adobe product or if you have Photoshop installed!

All credits to Portable Appz for the info.