Bip39 Standard. Although there are BIP39 wordlists in languages other than English, it is strongly not proposed to implement non-English words for wallet backups. It might make restoring the wallet difficult or extremely hard. Entropy is a sophisticated element. Your mnemonic might be insecure if this attribute is utilized incorrectly. https://bookmarkbells.com/story19384052/bip39-word-list-https-linktr-ee-bip39-not-known-factual-statements-about-bip39-list