Hey Ezequiel,
The Events Calendar, Events PRO, and all of the events add-ons are indeed translatable. This means that most, if not all, of the text strings within the plugin can be translated. There are many translation files already in the plugins.
You can set the language of your WordPress installation by adding a line of code like the following to your site’s wp-config.php file – I’m using the locale ‘es_ES’ here for Spanish, but there are other locales you may prefer:
define( 'WPLANG', 'es_ES' );
If you’re trying to change other aspects of the actual code of the plugin, however – like variable names, or HTML classes or IDs, this is unfortunately not possible by simply changing the WordPress locale.
Does my information here address your questions? If not, let me know about what you’re trying to do in more detail. Also, if you have a link to the original forum topic you mentioned, can you share that link?
Thanks!
George