Hello i was setting the wrong path to the install, now i got that working.
Also i have replaced the files, of my install and it seems to be ok, ive translated a few lines to "test" but i cant see them, (replaced the texts in the homepage).
Now i do have gettext in my linux server's php.ini, so extension is there.
I have changed this line:
$language='es-ES';
Since i just need spanish, restarted apache and still in english.
In my locale/es-ES/LC_MESSAGES folder i have 2 files messages.po and messages.mo
Am i missing something? thank you for your help.