Bip39 Seed. Although there are actually BIP39 wordlists in languages aside from English, it is strongly not proposed to employ non-English words for wallet backups. It would make restoring the wallet tough or difficult. And not using a passphrase, your resources are only as safe as your seed phrase. By https://throbsocial.com/story20909131/bip39-wallet-https-linktr-ee-bip39-the-fact-about-bip39-words-that-no-one-is-suggesting