Need to translate to user connected language the output of a couple of fields, from English (the value saved on DB) to Spanish for a Mako (or Jinja, I still don't understand which is which) report on Odoo V8.

I've checked in .po file that the translated terms exist but I don't know if that is the issue or not. 

I've tried to use the formatLang function used in Mako for Openerp (V7) with no success results.

Any suggestion is welcome

PD: and by the way, is it any "good" document about using Mako on Odoo V8?