This Plugin uses load_plugin_textdomain()
, which by default uses the Plugin’s root directory as the path for the translation files.
So: simply add the translation files you downloaded to the Plugin root directory, and you should be good to go.
Edit
And you’re using WordPress in es_ES?
No, I just want to translate that plugin. It generates a form with fields such as “Your Name” “Your Email” “Your Remark” and I need that form translated in Spanish.
If you actually want WordPress to use those translation files, you have to tell it to use them, by changing WPLANG
from en_US
to es_ES
in wp-config.php
.