Is there some kind of Wallet Backup / Seed generation?
How can I save/recreate my wallet in case of an data loss?
just backup privkey.der and pubkey.der.
address.txt might be handy too(doesn't mean anything but bismuth doesn't generate the new text file if it has privkey.der and it might be confusing if you launched the wallet at least once, replaced privkey and the old address remains). That's your wallet.dat analog
This coin is much trickier than that. For best results load the wallet on linux generate a new address and send your coins to that address, After you are done, backup and archive the whole bitsmuth directory. Encrypt that file and burn to a usb stick using a reputable usb burner. Your holdings are safe now until you either lose or crack that usb stick.
Instead of saving the whole folder, I think saving privkey.der and pubkey.der is enough.
You can use these two files to retrieve your wallet with any latest release.