Bip39 Passphrase. While you'll find BIP39 wordlists in languages in addition to English, it is actually strongly not advisable to make use of non-English words for wallet backups. It'd make restoring the wallet tricky or unattainable. BIP39 specifies a list of 2048 words from which the mnemonic phrase is picked. https://bookmarkgenius.com/story19399632/bip-39-https-linktr-ee-bip39-a-review-of-bip39-generator