Bip39 Passphrase. Although there are BIP39 wordlists in languages in addition to English, it really is strongly not encouraged to use non-English words for wallet backups. It might make restoring the wallet difficult or unachievable. BIP39 specifies a list of 2048 words from which the mnemonic phrase is picked out. https://bookmarkfox.com/story4355623/bip-39-https-linktr-ee-bip39-bip39-wallet-can-be-fun-for-anyone