Roger Roelandt translated the fbackup.com website in Dutch. You can check out the newly translated version here: fbackup.com/nl/.
If you want to help us translate the website (or the interface) in a language that's not yet translated in, you can start by visiting this page: Languages. You'll see here in which languages FBackup is not translated, and if you want to help you'll simply have to email us and we'll reply with details.

Nice work.

Do you need any assistance in translating the FBackup program, or is Roger already working on this?

If I can be of help, please feel free to send me some user-editable files. I may have some spare time the coming days.
Stephan

Yes, Roger is working on the translation of the interface too. However, if he won't be able to continue with the translation I'll contact you. Thank you for your offer to help!