Translate Custom Field Labels + Data

Hello,

I have been able to translate my custom theme pages using gettext, the .pot file , po and mo files.

What`s left for me to learn is how to translate the field names of my CustomPress custom post-type Custom Fields 'Labels'.

So stated simply, how can I translate the Custom Field labels as well as the custom Data of my 'Multi-Select Box' Options such as when I list some dates in English form. Would be nice to translate these dates in French form. see image...