Translator Plugins

Hello,
I’m trying to build a classifieds ads website but I want the site to be translatable in multiple languages by the users visiting the site. I have seen plugins for blog translators but does anyone know if these types of plugins would be compatible with the site I am trying to build? I would like the descriptions my users add of their products as well as the form they will fill out when placing the ad to all be translatable. Does anyone know of any good plugins for this? Thanks for your help.