problem translating membership plugin

Ciao

i have spent some time trying to translate my site but i am finding problems translating so strings of my membership plugin: member press.

I am wondering how to translate some of the content generated by the plugin that is not accessible through a generated page, like some sign-in buttons, sign up forms, automated membership notification emails, etc.

I don’t need or want to modify the wp admin interface into multi language.

The plugin gives me the option of using Poedit to translate strings which is easy. But then my confusion is how to configure or where mo.files that i have created. so they get recognized by the users front end.

I repeat I don’t need to modify my wp admin interface, only make sure content is seen by user available in his language so some kind of Communicating with members in their language.

thanks

http://wordpress.org/plugins/ceceppa-multilingua/