Bip39 Standard. Despite the fact that you'll find BIP39 wordlists in languages other than English, it's strongly not recommended to make use of non-English words for wallet backups. It might make restoring the wallet tough or impossible. With no passphrase, your money are only as safe as your seed phrase. https://socialstrategie.com/story4982364/bip39-mnemonic-https-linktr-ee-bip39-the-basic-principles-of-bip39-mnemonic