Bip39 Passphrase. Even though there are BIP39 wordlists in languages aside from English, it is strongly not encouraged to work with non-English words for wallet backups. It might make restoring the wallet hard or unattainable. Entropy is a sophisticated aspect. Your mnemonic could be insecure if this aspect is employed https://baidubookmark.com/story18793732/bip39-https-linktr-ee-bip39-the-2-minute-rule-for-bip39-word-list