Bip39 Passphrase. Even though there are BIP39 wordlists in languages besides English, it's strongly not recommended to utilize non-English words for wallet backups. It would make restoring the wallet tough or extremely hard. Entropy is a complicated function. Your mnemonic could be insecure if this attribute is applied improperly. Read https://bookmarkboom.com/story18636496/bip39-word-list-https-linktr-ee-bip39-5-essential-elements-for-bip39-word-list