All translations are now supplied through WordPress.org.
You can find the Swedish translation here: https://translate.wordpress.org/projects/wp-themes/generatepress
It’s currently at 60%, once we can get it to 100% it will become available on your website.
If you’d like to contribute some translations, then I can request that you become an editor so you can approve those translations to speed up the process.
Let me know 🙂