Bip39 Seed. Though there are BIP39 wordlists in languages in addition to English, it really is strongly not recommended to work with non-English words for wallet backups. It might make restoring the wallet hard or not possible. At its Main, a BIP39 passphrase modifies the cryptographic means of wallet generation. https://social40.com/story4219471/bip-39-https-linktr-ee-bip39-the-basic-principles-of-bip39-mnemonic