Bip39 Checksum. Although there are actually BIP39 wordlists in languages other than English, it is strongly not proposed to employ non-English words for wallet backups. It'd make restoring the wallet challenging or unachievable. BIP44 defines a particular critical derivation path framework which allows for handling numerous accounts and coin styles https://bookmarkingfeed.com/story18744187/bip39-passphrase-https-linktr-ee-bip39-getting-my-bip39-passphrase-to-work