The croatian language pack is not yet available but there is a guide on how to translate it yourself. You may check the available language and the guide here http://appthemes.com/resources/classipress/.
Please help our moderating team work more efficiently by not sending us support questions via PM. You can read more about how AppThemes support works here. However, you can send a PM to follow up and remind me if I missed your support request/thread.
