Can you tell me how to change a language?
Profit Builder can’t do that itself, unfortunately. This is actually a WordPress feature, and I show how to change the language here: https://screencast-o-matic.com/watch/cbl3bO2PpV
You will still see the “your message goes here” in English. For this, one thing you might try is a third-party plugin called Transposh: http://transposh.org/
WPML might be an option: http://wpml.org/
As always, before using any third-party plugins, be sure to back your site up (you can use Duplicator for this: https://wordpress.org/plugins/duplicator/)