Bip39 Words. Despite the fact that you'll find BIP39 wordlists in languages besides English, it really is strongly not suggested to use non-English words for wallet backups. It would make restoring the wallet hard or difficult. BIP39 specifies a list of 2048 words from which the mnemonic phrase is picked. https://hotbookmarkings.com/story19152143/bip39-mnemonic-https-linktr-ee-bip39-top-guidelines-of-bip39-passphrase