There is now no need to edit a file functions.php or download the server separately .mo and .po fragments. To translate strings, just install this extension. If you are interested in the status of the translation, you can check their website. translate.studiopress.com and, of course, improve them, after registering on the project. You also have the ability to view which languages are supported at the moment, and what percentage of their execution.
If you can not find your language, you can send a request to the developer of the plugin. The device operates exclusively on the Genesis Framework.