And you can update the language by these two ways:
1, Get the language file from OrbitDownloader's download page. Simply drop Orbit.lng into the Install Dir \OrbitDownloader and restart it. OrbitDownloader should automatically change to your system language once you restart it.
2, Open the Options, go to View-language and select your language from the drop down list, check the language pack and update.
If you have a superior translation, you can send it to this address: firstname.lastname@example.org, thank you so much.