Okay, solved.
My bad. I wasn’t completely aware of how Loco translate worked and I thought it was not necessary. I downloaded the .po file from the translation page of your plugin
Then I imported it but I couldn’t get it working, until i changed the -{locale} section to Spanish from Spain, so “es_ES”. I didn’t take into account that there are different Spanish variations.
Hope at least it may help if anyone gets here having doubts.
I added suggestions for a catalan translation, too ??