Plugin for translation

Hi, im using CATABLOG to create a catalog of my books. I need to create a bilingual page so I need a plugin that does the translation for me but lets me add custom types in the pages and blogs for example ENGLISH DESCRIPTION and SPANISH DESCRITION and once a visitor changes the language to spanish they will see the description in spanish.

I need someone to help me out and tell me of a plugin which i can achieve this with please.
Thanks in advance for your reply