Bip39 Checksum. While there are BIP39 wordlists in languages besides English, it's strongly not suggested to work with non-English words for wallet backups. It would make restoring the wallet hard or impossible. Any one else who discovers the phrase can steal the bitcoins. It have to be stored mystery, one https://cruxbookmarks.com/story19123390/bip39-wallet-https-linktr-ee-bip39-the-2-minute-rule-for-bip39-word-list